Yakovenko, G. G., and M. V. Vovk. “Convenient Approaches to the Synthesis of 6-Amino- and 6-oxoimidazo[4,5-b]pyrazolo[3,4-e]pyridines”. Journal of Organic and Pharmaceutical Chemistry 19, no. 1(73) (March 15, 2021): 10–15. Accessed May 5, 2024. https://ophcj.nuph.edu.ua/article/view/224583.