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Hermann Haller (1880–1950). Guided by Encounters with People – Figures and Portraits Formed, in: Ottfried Dascher and Helen Shiner (eds.): The Leap into Space. Sculptures at Alfred Flechtheim. Wädenswil 2016. (Nimbus Verlag, in print).
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Annotated Auction Catalogues from the Period 1933–1945 at the Institute of Art History, University of Cologne, and the Art Dealer Eduard Plietzsch (1886–1961), as online publication, Institute of Art History, University of Cologne (in preparation).
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Hildebrand Gurlitt (1895–1956) and his Sphere of Influence in the Nazi Era, in: Johannes Heil and Annette Weber (eds.): Looted Art – The Gurlitt Case. Berlin 2015, pp. 19–36.
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Max Pechstein: Blumenstillleben (Still Life with Flowers), in: Andrea Bambi and Axel Drecoll (eds.): Alfred Flechtheim. Looted Art and Restitution. Berlin 2015, pp. 225–227.
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Julius Bretz (26.01.1870 Wiesbaden – 26.12.1953 Bad Honnef) – Alfred Flechtheim and Julius Bretz. Alfred Flechtheim.com. Art Dealer of the Avant-Garde, Bavarian State Painting Collections, Kunstareal Munich 2013. URL:
http://alfredflechtheim.com/kuenstler/julius-bretz/.
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Ernesto de Fiori (13.12.1884 Rome – 24.04.1945 São Paulo), Alfred Flechtheim and Ernesto de Fiori, Alfred Flechtheim.com, Art Dealer of the Avant-Garde, Bavarian State Painting Collections, Kunstareal Munich 2013. URL:
http://alfredflechtheim.com/kuenstler/ernesto-de-fiori/.
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Pablo Picasso: La Familia Soler, 1903, in: Rutas para ti. Teacher’s Book. Paderborn 2013, pp. 82–83.
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10 Years “Arbeitskreis Provenienzforschung” [Provenance Research Working Group], An Experience Report, in: The Responsibility Continues. Contributions of German Institutions to the Handling of Cultural Property Seized as a Result of Nazi Persecution. (Publications of the Coordination Office for Lost Cultural Assets, Vol. 8), ed. by Andrea Baresel-Brand, Magdeburg 2010, pp. 335–350.
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Architectural History of the Gothic Pilgrimage Church of the Holy Cross in Stromberg, in: Heimatverein Stromberg: 800 Years of Pilgrimage and Stromberg History. Between Cross and Sword. Warendorf 2007, pp. 241–275.
(with Nina Senger): Methodology of Provenance Research Using the Example of the Collection of the Art Dealer Jacques Goudstikker, Amsterdam, in: AKMB news. Information on Art, Museum and Library, Vol. 11 (2005), No. 2, pp. 27–32.
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Hildebrand Gurlitt and the Art Trade during the Nazi Period, in: Vitalizing Memory. International Perspectives on Provenance Research. American Association of Museums, Washington 2005, pp. 165–171.
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Museums in Twilight – Acquisition Policies 1933–1945, in: German Museums Association, Bulletin 01/2002, Dresden/Berlin 2002, pp. 9–10.
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Museums in Twilight – Acquisition Policies 1933–1945, in: ICOM-Germany, Bulletin Berlin 2002/1, pp. 21–23.
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Museums in Twilight – Acquisition Policies 1933–1945, in: AKMB news. Information on Art, Museum and Library, Vol. 8 (2002), No. 2, pp. 3–5.
- The Wallraf-Richartz Museum during the Years 1933–1945, in: Museums in Twilight – Our Own History. Conference Volume Cologne and Hamburg. (Publications of the Coordination Office for Lost Cultural Assets, Vol. 2), ed. by Ulf Häder with the collaboration of Katja Terlau and Ute Haug, Magdeburg 2002, pp. 21–39, 2nd expanded edition, Magdeburg 2007, pp. 31–49.
(with Henriette von Winterfeld): Conference Report “Repatriation of Cultural Property” in Nuremberg, in: Bulletin of the German Museums Association 4/2002, pp. 9–11.
(with Henriette von Winterfeld): Report on the Conference “Repatriation of Cultural Property” in Nuremberg, in: AKMB news, Vol. 8 (2002), pp. 58–60.
- History of the Wallraf-Richartz Museum, in: Wallraf-Richartz Museum and Building Management of the City of Cologne (eds.). Wallraf-Richartz Museum. The New Building. Architecture by Oswald Mathias Ungers. Cologne 2001, pp. 7–11.
- The Re-conception of the Collection, in: Wallraf-Richartz Museum and Building Management of the City of Cologne (eds.). Wallraf-Richartz Museum. The New Building. Architecture by Oswald Mathias Ungers. Cologne 2001, pp. 51–100.
- Oswald Mathias Ungers and the New Building of the Cologne Wallraf-Richartz Museum, in: Form und Stil. Festschrift für Günther Binding zum 65. Geburtstag. Darmstadt 2001, pp. 387–393.
- The History of the Cologne Wallraf-Richartz Museum 1933–1945, in: AKMB news 7, 2001, pp. 11–12.
- The Wallraf-Richartz Museum and its Acquisition Policy 1933–1945. Preliminary Research Report, in: Wallraf-Richartz Yearbook, Vol. LXII, 2001, pp. 277–292.
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The History of the Cologne Wallraf-Richartz Museum 1933–1945, in: AKMB news. Information on Art, Museum and Library, Vol. 7 (2001), No. 3, pp. 11–12.
- Restitution of the Painting Landscape with a Broken Bridge after Meindert Hobbema from the Collection of Frederico Gentili di Giuseppe, in: Contributions of Public Institutions of the Federal Republic of Germany to the Handling of Cultural Property from Former Jewish Ownership. (Publications of the Coordination Office for Lost Cultural Assets, Vol. 1), Magdeburg 2001, pp. 186–193.
- A Picasso at the Wallraf-Richartz Museum? Cologne Museums, Picture of the Week 24 – June 11 to 18, 2001. URL: http://www.museenkoeln.de/portal/bild-der-woche.aspx?bdw=2001_24.
- The Man Who Showers. Cologne Museums, Picture of the Week 31 – July 31 to August 7, 2000. URL: http://www.museenkoeln.de/portal/bild-der-woche.aspx?bdw=2000_31
- Project: Wallraf-Richartz Museum Cologne in the Nazi Era 1933–1945, in: AKMB news. Information on Art, Museum and Library, Vol. 6 (2000), No. 2, p. 33.
- The Choir Chapels of Cologne Cathedral and Westphalian Architecture Using the Example of the Church of the Holy Cross in Stromberg. A Comparative Building Study, in: Wallraf-Richartz Yearbook, Vol. LXI, 2000, pp. 7–22.
- Excavations in the Romanesque Church of St. Kilian in Büren-Brenken, District of Paderborn, in: Excavations and Finds in Westphalia-Lippe, Vol. 9C. Münster 1999, pp. 105–124.
- A Rock Crystal Cross from the 14th Century (Schnütgen Museum, Cologne), in: Ralf Dank: Cologne Catalogue. Premieres 96, Cologne 1996, p. 150.
- Book Clasps and Horse Pendants, in: der sassenspeughel. Sachsenspiegel – Law – Everyday Life, ed. by Mamoun Fansa, Exhibition Catalogue Oldenburg 1995, pp. 439–440; 471–472.
- Book Clasps, in: The Excavation at Liesborn Abbey, ed. by Hans-Werner Peine, Münster 1993, pp. 206–210.
