Archive
Editorial activity
Collaboration with the "BIT"
Card, C.-E. Froeberg->A.P. Ershov, 09.01.1981
from the BIT journal.
Letter, C.-E. Froeberg->A.P. Ershov, 23.02.1981
The editor of BIT thanks prof. Ershov for his valuable assistance in completing the 20th annual volume of the journal.
Letter, C.-E. Froeberg->A.P. Ershov, 22.12.1982
Card, C.-E. Froeberg->A.P. Ershov, 21.11.1983
Covering letter, A.P. Ershov->C.-E. Froeberg, 19.12.1983
to the review of the paper "On context free and Szilard language".
Letter, C.-E. Froeberg->A.P. Ershov, 26.12.1983
Letter, C.-E. Froeberg->A.P. Ershov, 28.12.1984
Covering card, C.-E. Froeberg->A.P. Ershov, 25.01.1985
Review (draft)
Sammary (hand-written), A.P. Ershov->C.-E. Froeberg, 06.05.1985
Letter, C.-E. Froeberg->A.P. Ershov, 17.01.1986
Form, 16.02.1986
Letter, A.P. Ershov->C.-E. Froeberg, 29.07.1986
Letter, C.-E. Froeberg->A.P. Ershov, 28.11.1986
Letter, C.-E. Froeberg->A.P. Ershov, 09.12.1987

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