Markovic, Violeta; Eric, Slavica; Stanojkovic, Tatjana; Gligorijevic, Nevenka; Aranelovic, Sandra; Todorovic, Nina; Trifunovic, Snezana; Manojlovic, Nedeljko; Jelic, Ratomir; Joksovic, Milan D. Bioorganic and Medicinal Chemistry Letters, 2011 , vol. 21, # 15 p. 4416 - 4421