APA (7th ed.) Zitazioa
Fenchel, W. (1989). Elementary geometry in hyperbolic space. Walter de Gruyter.
Chicago Style (17th ed.) Zitazioa
Fenchel, W. Elementary Geometry in Hyperbolic Space. Berlin ; New York: Walter de Gruyter, 1989.
MLA (9th ed.) Zitazioa
Fenchel, W. Elementary Geometry in Hyperbolic Space. Walter de Gruyter, 1989.
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