共 50 条
- [1] 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
- [2] The projective differential geometry of forms in R-4 PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (1/5): : 465 - 470
- [3] The projective differential geometry of forms in R-4 PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1940, 43 (1/5): : 440 - 448
- [4] On the projective differential geometry of the standard area in R-4 (Eighth announcement) PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (1/5): : 17 - 19
- [5] 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
- [6] On the projective differential geometry of standard areas in R-4 (Ninth announcement) PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (1/5): : 184 - 188
- [7] The projective differential geometry of recalculations in R-4 (Sixth communication) PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1941, 44 (6/10): : 1052 - 1057
- [8] Associated straight lines in forms of R-4 PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1940, 43 (1/5): : 325 - 333
- [9] The projective invariants of four and five even numbers in R-4 PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1939, 42 (1/5): : 245 - 252