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- [6] ON A CLASS OF NON-ELLIPTIC LINEAR PARTIAL-DIFFERENTIAL EQUATIONS ACTA MATHEMATICA ACADEMIAE SCIENTIARUM HUNGARICAE, 1981, 37 (04): : 395 - 398
- [8] AN UNCOUPLING PROCEDURE FOR A CLASS OF COUPLED LINEAR PARTIAL-DIFFERENTIAL EQUATIONS JOURNAL OF THE AUSTRALIAN MATHEMATICAL SOCIETY SERIES B-APPLIED MATHEMATICS, 1985, 26 (APR): : 503 - 516