Berezansky, Y.M., Vereikina, M.B., Kolyada, S.F., Romanenko, O.Y., Sivak, A.G. and Fedorenko, V.V. 1996. Aleksandr Nikolaevich Sharkovsky (on his 60th birthday). Ukrains’kyi Matematychnyi Zhurnal. 48, 12 (Dec. 1996), 1602-1603.