共 15 条
- [2] Bessel-Hagen E, 1921, MATH ANN, V84, P258
- [3] COURANT R, 1931, METHODEN MATH PHYSIK, P223
- [4] de Donder T, 1935, THEORIE INVARIANTIVE
- [5] ENGEL F, 1917, NACHR KGL GES WISS G, P189
- [6] Engel F, 1916, NACHR KGL GES WISS G, P270
- [7] Engel F, 1932, LIESCHE THEORIE PART
- [8] JAUCH JM, 1948, ACAD BRASILEIRA CIEN, V20, P353
- [9] MOLLER C, 1949, COMMUNS DUBLIN I A A
- [10] Noether E, 1918, NACHR KONIG GESELLSC, V2, P235