Sabine Boos, Kulturgut als Gegenstand des grenzüberschreitenden Leihverkehrs (Cultural Property as Objects of Transnational Loans) pp. 328. Duncker & Humblot, Berlin, 2006. ISBN 3-428-12034-5.

Almost every important art exhibition also exhibits art objects on loan from domestic or foreign institutions or private owners. Recently, this lending policy has been severely threatened by third parties trying to attach art objects on loan from foreign countries and claiming to be the rightful owners of these objects, which were expropriated many years ago by the Nazis or stolen, converted, or confiscated abroad. Also, creditors of lending institutions may try to get hold of these objects and liquidate them. The Schiele affair, the Malewicz case, and the Russian-Swiss controversy about loans to the Fondation Pierre Gianadda at Martigny, Switzerland, from the Pushkin Museum in Moscow illustrate these dangers. Therefore, any study dealing with these problems and offering solutions for preventing or mitigating such clashes of interest is welcome. Boos devoted her research for a doctoral thesis, submitted to the University of Düsseldorf, Germany, to these problems, mainly those of a return guarantee given to the foreign lending institution with respect to art objects on loan for a local exhibition.