共 50 条
- [32] ON THE PROBLEM OF CONJUGATION OF THE SOLUTIONS OF 2ND-ORDER PARTIAL-DIFFERENTIAL EQUATION ON A PLANE DOKLADY AKADEMII NAUK SSSR, 1981, 256 (02): : 276 - 281
- [35] LOCAL EQUIVALENCE OF QUASI-LINEAR PARTIAL-DIFFERENTIAL EQUATIONS OF 2ND-ORDER AND INFINITE PSEUDO GROUPS COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1986, 303 (12): : 555 - 558