TY - JOUR AU - O. Yu. Hryshchenko AU - D. A. Klyushin AU - S. I. Lyashko AU - I. V. Sergienko PY - 2012/11/25 Y2 - 2024/03/28 TI - Ivan Ivanovych Lyashko (on his 90 th birthday) JF - Ukrains’kyi Matematychnyi Zhurnal JA - Ukr. Mat. Zhurn. VL - 64 IS - 11 SE - Anniversaries DO - UR - https://umj.imath.kiev.ua/index.php/umj/article/view/2681 AB - ER -