Sedlacek, H.-Harald, Dieter Hoffmann, Jörg Czech, Cenek Kolar, Gerhard Seemann, Dettef Güssow, and Klaus Bosslet. 1991. “The Change in Research for the Therapy of Tumors”. CHIMIA 45 (10):311. https://doi.org/10.2533/chimia.1991.311.