共 5 条
[1]
ALEXANDER JW, 1915, ANN MATH, V16
[2]
BEBLEN O, ANAL SITUS, P155
[3]
DEHN M, 1910, MATH ANN, V69
[4]
HEEGAARD P, 1916, B SOC MATH FRANCE, V44
[5]
POINCARE H, RENDICONTEI CIRCOLO, V18