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- [1] GENERALIZED STURM THEOREM FOR PARTIAL-DIFFERENTIAL EQUATIONS DOPOVIDI AKADEMII NAUK UKRAINSKOI RSR SERIYA A-FIZIKO-MATEMATICHNI TA TECHNICHNI NAUKI, 1981, (05): : 13 - 16
- [2] MAILLET TYPE THEOREM FOR A CLASS OF SINGULAR PARTIAL-DIFFERENTIAL EQUATIONS COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1991, 312 (07): : 499 - 502
- [4] NONLINEAR DEGENERATE EVOLUTION EQUATIONS AND PARTIAL-DIFFERENTIAL EQUATIONS OF MIXED TYPE NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1975, 22 (01): : A144 - A144
- [6] A NOTE ON THE NUMERICAL-SOLUTION OF PARTIAL-DIFFERENTIAL EQUATIONS OF MIXED TYPE COMMUNICATIONS IN APPLIED NUMERICAL METHODS, 1991, 7 (01): : 35 - 37
- [9] THE EDGE-OF-THE-WEDGE THEOREM FOR PARTIAL-DIFFERENTIAL EQUATIONS ANNALS OF MATHEMATICS STUDIES, 1981, (100): : 155 - 169