Reference, 07.09.1963 on occasion of nominating A.Ershov "Senior Research Fellow".
Reference, 26.12.1967on A.P. Ershov's scientific and organizational activities.
Reference, 01.01.1968(?)on A.P. Ershov's scientific and organizational activities in the years 1965-67.
Reference, 01.01.1968(?)on A.P. Ershov's scientific activities.
Reference, 01.01.1971on A.P. Ershov's activities.
Reference, 01.01.1977on scientific and administrative work of A.P. Ershov
Reference, 01.10.1984on A.P. Ershov's activities.
Reference, 01.10.1984on A.P. Ershov's scientific activity.
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