共 50 条
- [24] Contribution to the theory of the Pfaff system of equations PROCEEDINGS OF THE KONINKLIJKE NEDERLANDSE AKADEMIE VAN WETENSCHAPPEN, 1942, 45 (6/10): : 624 - 629
- [27] On the degree of smoothness of solutions of functional differential equations TRUDY INSTITUTA MATEMATIKI I MEKHANIKI URO RAN, 2007, 13 (02): : 120 - 123
- [28] Coincidence degree and periodic solutions of Duffing equations Nonlinear Analysis, Theory, Methods and Applications, 1998, 34 (03): : 443 - 460
- [29] DEGREE OF SHARPNESS IN SOLUTIONS OF EINSTEINS FIELD EQUATIONS PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1971, 321 (1546): : 397 - &