Eckmann, B., and Hilton, P.J.. "Homotopy Groups of Maps and Exact Sequences.." Commentarii mathematici Helvetici 34 (1960): 271-304. <http://eudml.org/doc/139197>.
@article{Eckmann1960, author = {Eckmann, B., Hilton, P.J.}, journal = {Commentarii mathematici Helvetici}, keywords = {topology}, pages = {271-304}, title = {Homotopy Groups of Maps and Exact Sequences.}, url = {http://eudml.org/doc/139197}, volume = {34}, year = {1960}, }
TY - JOUR AU - Eckmann, B. AU - Hilton, P.J. TI - Homotopy Groups of Maps and Exact Sequences. JO - Commentarii mathematici Helvetici PY - 1960 VL - 34 SP - 271 EP - 304 KW - topology UR - http://eudml.org/doc/139197 ER -