Andreev, A.V., Atsarkin, V.A., Ivanov, K.V., Kurtik, G.E., Lo Nostro, P., V. Ptushenko, V.V., Tomilin, K.A., Vdovichenko, N.V. and Vizgin, V.P. 2022. Obituary: Professor Alexander Kessenikh (1932-2021). Substantia. 6, 1 (Mar. 2022), 145–147. DOI:https://doi.org/10.36253/Substantia-1561.