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@article{MASLO_1999__49_1_a8, author = {Akhmet'ev, Pjotr and Sz\'{u}cs, Andr\'as}, title = {Geometric proof of the easy part of the {Hopf} invariant one theorem}, journal = {Mathematica slovaca}, pages = {71--74}, publisher = {mathdoc}, volume = {49}, number = {1}, year = {1999}, mrnumber = {1804475}, zbl = {0941.55011}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1999__49_1_a8/} }
Akhmet'ev, Pjotr; Szűcs, András. Geometric proof of the easy part of the Hopf invariant one theorem. Mathematica slovaca, Tome 49 (1999) no. 1, pp. 71-74. http://geodesic.mathdoc.fr/item/MASLO_1999__49_1_a8/