BerezanskyY. M.; GerasimenkoV. I.; KochubeiA. N.; MikhailetsV. A.; NizhnikL. P.; SamoilenkoA. M.; SamoilenkoY. S.; KhruslovE. Y. Myroslav L’vovych Horbachuk (on his 75 th birthday). Ukrains’kyi Matematychnyi Zhurnal, v. 65, n. 3, p. 451-454, 25 Mar. 2013.