A GENERALIZATION OF THE HOPF INVARIANT

[1] ALEXANDROFF P, 1935, TOPOLOGIE, V1, pCH12

[2] ECKMANN B, 1942, COMMENT MATH HELV, V15, P1

[3] ECKMANN B, 1941, COMMENT MATH HELV, V14, P234

[4] Eckmann B., 1941, COMMENT MATH HELV, V14, P141

[5] Singular homology theory [J]. ANNALS OF MATHEMATICS, 1944, 45 : 407 - 447

[6] On continuous mappings of manifolds into spheres [J]. ANNALS OF MATHEMATICS, 1940, 41 : 662 - 673

[7] Fox R., 1943, B AM MATH SOC, V49, P733

[8] HOMOTOPY GROUPS AND TORUS HOMOTOPY GROUPS [J]. ANNALS OF MATHEMATICS, 1948, 49 (02) : 471 - 510

[9] FREUDENTHAL H, 1937, COMPOS MATH, V5, P299

[10] Mapping of three dimensional spheres on spheric surphaces [J]. MATHEMATISCHE ANNALEN, 1931, 104 : 637 - 665

[1] ALEXANDROFF P, 1935, TOPOLOGIE, V1, pCH12

[2] ECKMANN B, 1942, COMMENT MATH HELV, V15, P1

[3] ECKMANN B, 1941, COMMENT MATH HELV, V14, P234

[4] Eckmann B., 1941, COMMENT MATH HELV, V14, P141

[5] Singular homology theory [J]. ANNALS OF MATHEMATICS, 1944, 45 : 407 - 447

[6] On continuous mappings of manifolds into spheres [J]. ANNALS OF MATHEMATICS, 1940, 41 : 662 - 673

[7] Fox R., 1943, B AM MATH SOC, V49, P733

[8] HOMOTOPY GROUPS AND TORUS HOMOTOPY GROUPS [J]. ANNALS OF MATHEMATICS, 1948, 49 (02) : 471 - 510

[9] FREUDENTHAL H, 1937, COMPOS MATH, V5, P299

[10] Mapping of three dimensional spheres on spheric surphaces [J]. MATHEMATISCHE ANNALEN, 1931, 104 : 637 - 665