Examination of the topology of closed two sided areas

[1] ALEXANDLR JW, T AM MATH SOC, V25

[2] BROUWER IEJ, MATH ANN, V71, P97

[3] BROUWER LEJ, MINIMALZAHL FEXPUNKT

[4] BROUWER LEJ, 1913, P 5 INT C MATH CAMBR

[5] Transformation of curves on double-sided surfaces [J]. MATHEMATISCHE ANNALEN, 1912, 72 : 413 - 421

[6] DEHN M, 1911, MATH ANN, V119

[7] DEHN M, 1911, MATH ANN, V71

[8] GIESEKING H, 1912, ANAL UNTERSUCHUNGEN

[9] HOPE H, 1927, MATH Z

[10] HOTEILING H, 1925, T AM MATH SOC, V27

[1] ALEXANDLR JW, T AM MATH SOC, V25

[2] BROUWER IEJ, MATH ANN, V71, P97

[3] BROUWER LEJ, MINIMALZAHL FEXPUNKT

[4] BROUWER LEJ, 1913, P 5 INT C MATH CAMBR

[5] Transformation of curves on double-sided surfaces [J]. MATHEMATISCHE ANNALEN, 1912, 72 : 413 - 421

[6] DEHN M, 1911, MATH ANN, V119

[7] DEHN M, 1911, MATH ANN, V71

[8] GIESEKING H, 1912, ANAL UNTERSUCHUNGEN

[9] HOPE H, 1927, MATH Z

[10] HOTEILING H, 1925, T AM MATH SOC, V27