TY  - DATA
AU  - M. Arkowitz
AU  -  C. R. Curjel
TI  - Groups of Homotopy Classes
T2  - Lecture Notes in Mathematics
SN  - 9783540349686
PY  - 1967///
CY  - Heidelberg
PB  - Springer Berlin
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0099647
ER  -