Losses of Science In commemoration of Sakhat M. Shammakov (1933 – 2021) Authors: Ananjeva N. B., Rustamov E. A., Tuniev B. S., Orlov N. L., Shestopal A. A. In commemoration of Sakhat M. Shammakov IN COMMEMORATION OF TATYANY I. ZHUKOVA (1938 - 2017) Authors: Peskova T. Y. Losses of Science IN COMMEMORATION OF EUGENE M. PISANETS (1949 - 2016) Authors: Dotsenko I. B. 1 1