Cita APA

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

Citación estilo Chicago

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

Cita MLA

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

Warning: These citations may not always be 100% accurate.