Gotsulya, A. S. “Synthesis, Physical and Chemical Research of Alkyl-, Heterylderivatives of 7’-((4-Ethyl-5-Thio-4H-1,2,4-Triazoles-3-yl)methyl)theophylline”. Current Issues in Pharmacy and Medicine: Science and Practice, no. 2, June 2016, doi:10.14739/2409-2932.2016.2.71080.