共 11 条
- [1] ALEXANDROFF H, TOPOLOGIE, V1, P413
- [2] COURANT, 1940, P NATL ACAD SCI, V26, P194
- [3] COURANT H, FUNKTIONENTHEORIE
- [4] COURANT IR, 1938, P NATL ACAD SCI USA, V24, P97
- [8] COURANT R, IN PRESS GENERALIZED
- [9] Minimal surfaces of higher topological structure [J]. ANNALS OF MATHEMATICS, 1939, 40 : 205 - 298
- [10] RITTER I, UNPUB SOLUTION SCHWA