Bogolyubov, A. N., K. G. Valeyev, and P. M. Tamrazov. 1994. “On the 75th Birthday of Vyacheslav Alekseevich Dobrovol’skii”. Ukrains’kyi Matematychnyi Zhurnal 46 (10): 1409. https://umj.imath.kiev.ua/index.php/umj/article/view/5621.