Dyfyniad APA

Erkama, T. (1973). Group actions and extension problems for maps of balls. Suomalainen Tiedeakatemia.

Dyfyniad Arddull Chicago

Erkama, Timo. Group Actions and Extension Problems for Maps of Balls. Helsinki: Suomalainen Tiedeakatemia, 1973.

Dyfyniad MLA

Erkama, Timo. Group Actions and Extension Problems for Maps of Balls. Suomalainen Tiedeakatemia, 1973.

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