Gotsulya, A. S. “Synthesis and Physical Properties of Esters of 2-[5-((theophylline-7ʹ-yl)methyl)-4-R-1,2,4-Triazole-3-ylthio]acetic Acid”. Current Issues in Pharmacy and Medicine: Science and Practice, no. 2, June 2017, doi:10.14739/2409-2932.2017.2.103277.