1.
, . Groups of homotopy classes. Berlin, Göttingen, Heidelberg: Springer-Verlag; 1964.
et . Groups of homotopy classes. Berlin, Göttingen, Heidelberg : Springer-Verlag, 21 mai 1964. ISBN 0-387-03900-7
Arkowitz Martin & Curjel Caspar. (1964). Groups of homotopy classes: Rank formulas and homotopy-commutativity. Springer-Verlag.
MLA (8th ed.) CitationArkowitz Martin and Curjel Caspar. Groups of Homotopy Classes: Rank Formulas and Homotopy-commutativity. Springer-Verlag, 1964.
Warning: These citations may not always be 100% accurate.