@article{AA_2004_16_4_a8,
     author = {S. S. Podkorytov},
     title = {On mappings of a~sphere to a~simply connected space with finitely generated homotopy groups},
     journal = {Algebra i analiz},
     pages = {153--192},
     publisher = {mathdoc},
     volume = {16},
     number = {4},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2004_16_4_a8/}
}