Analysis of information sources in references of the Wikipedia article "Oskar Reichel" in English language version.
Oskar Reichel carried on a successful art business in Vienna until the March 1938 Nazi Anschluss. By June 1938, Hans Reichel left Austria to settle in Illinois. In November 1938, the Nazis closed down and liquidated Oskar Reichel's art business. By February 1939, he sold his Kokoschka paintings to a longtime business associate living in Paris, the Viennese Jewish art dealer Otto Kallir. The next month, another Reichel son, Raimund, fled Austria for Paraguay. In the two years following, Oskar Reichel was forced by the Nazis to sell his home, and another son, Max, was deported to a concentration camp and killed. In January 1943, Oskar Reichel's wife, Malvine, was also deported to a concentration camp, and a few months later Oskar died of "natural causes."