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JOURNALS // Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika // Archive

Izv. Vyssh. Uchebn. Zaved. Mat., 1971 Number 7, Pages 71–80 (Mi ivm3898)

Fundamental properties of $E$-groups on the plane

N. V. Stepanov

Velikie Luki

UDC: 513.8

Received: 30.09.1969



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