APA citiranje

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

Chicago Style (17th ed.) Citation

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

MLA citiranje

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