@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},
     year = {1999},
     volume = {49},
     number = {1},
     mrnumber = {1804475},
     zbl = {0941.55011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1999_49_1_a8/}
}