Telegram, A.P. Ershov->J. Kazimour, 14.04.1981
Letter, A.P. Ershov->J. Gruska, 17.04.1981
Telegram, A.P. Ershov->B. Levrat, 29.04.1981
Telegram, A.P. Ershov->van Vliet, J. C., 29.04.1981
Letter, 07.05.1981
Telegram, A.P. Ershov->M. Chytil, 08.05.1981
Letter (hand-written), A.P. Ershov->V. R. Basili, 13.05.1981
Letter (hand-written), A.P. Ershov->Tony Hoare, 11.05.1981Comments on the translation of the article about E.Dijkstra; congratulations with the Turing Award and appereciation of the addressee's speech
Letter (hand-written), A.P. Ershov->B. K. Rosen, 14.05.1981Request for an opinion on the paper by V. Sabelfeld "The tree equivalence of linear recursive schemata in polynomial-time decidable"; asks for the references to the up-to-date works on the subject of Ershov's presentation at the MFCS'81 Conference
Letter, A.P. Ershov->A. Meshko, 15.05.1981
Letter (hand-written), A.P. Ershov->M. Paul, 11.06.1981
Letter, A.P. Ershov->Tony Hoare, 12.06.1981
Letter (hand-written), A.P. Ershov->M. Ezhova, 13.08.1981
Letter, A.P. Ershov->W. M. Turski, 13.08.1981
Letter, A.P. Ershov->A. Lovejoy, 11.08.1981
Letter, 24.08.1981
Letter (hand-written), A.P. Ershov->H. F. Sherwood, 24.10.1981Account of the current scientific and personal affairs, travel, meetings with mutual acquaintances; sharing memories of the last meeting in Kiev
Letter, A.P. Ershov->R. Sharpe, 13.11.1981
Covering letter, A.P. Ershov->M. Loucocci, 16.11.1981
Letter, A.P. Ershov->T. V. Natarajan, 15.11.1981
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