LUKOVSKY, I.; MAKAROV, V. L.; BOICHUK, O. A.; NIKITIN, A. H.; VASYLYK, V. B.; MAZKO, O. H.; PLAKSA, S. A.; ROMANYUK, A. S. Oleksandr Mykolayovych Tymokha (to his 60th birthday). Ukrains’kyi Matematychnyi Zhurnal, v. 74, n. 8, p. 1146 - 1148, 4 Oct. 2022.