HOCKOVÁ, Dana, HOCEK, Michal, DVOŘÁKOVÁ, H., VOTRUBA, Ivan. Synthesis and cytostatic activity of nucleosides and acyclic nucleoside analogues derived from 6-(trifluoromethyl)purines. Tetrahedron. 1999, 55(36), 11109-11118. ISSN 0040-4020. E-ISSN 1464-5416.