共 50 条
- [1] The projective differential geometry of forms in R-4 PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (1/5): : 465 - 470
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- [5] Projective differential geometry of forms in R-4 (Thirteenth announcement) PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (6/10): : 669 - 674
- [6] On projective differential geometry of forms in R-4 (Seventh memorandum) PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1941, 44 (6/10): : 1185 - 1189
- [7] The projective differential geometry of forms in R-4 (Twelfth announcement) PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (6/10): : 540 - 545
- [10] Projective Geometry DIRICHLET PROBLEM FOR ELLIPTIC-HYPERBOLIC EQUATIONS OF KELDYSH TYPE, 2012, 2043 : 145 - 167