β€œIn Memoriam Alexander Putchkov (05.09.1954–30.04.2021)”. The Kharkov Entomological Society Gazette 29, no. 2 (November 9, 2022): 50–56. Accessed November 21, 2024. https://entomology.kharkiv.ua/index.php/KhESG/article/view/59.