共 28 条
- [2] ATKINSON FV, 1949, PHILOS MAG, V40, P645
- [4] COURANT R, 1950, DIRICHLETS PRINCIPLE
- [5] COURANT R, 1962, METHODS MATHEMATICAL, V2
- [7] GRAVES LM, 1956, 1 U CHIC TECH REP IN
- [8] JONES DS, 1953, P CAMB SOC, V49, P668, DOI DOI 10.1017/S0305004100028875)
- [10] Korn A., 1907, ANN SCI C NORM SUP R, V24, P9, DOI [10.24033/asens.575, DOI 10.24033/ASENS.575]