Letter Request to check the corrections and to express the opinion about advisability of publishing V.K. Sabelfeld’s “A letter to editors”; request to prepare a material for “Kibernetika” anniversary issue and to find out Liapunov’s reaction to congratulations in his honor. Date: 17.02.1972 Original document language: russian Authors: Nadezhda S. Furs Organizations: "Kibernetika" Editorial Board Persons: Viktor K. Sabelfeld, O. N. Zubova Addressee: Andrei Petrovich Ershov