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- [42] DIRICHLET PROBLEM FOR DEGENERATED ELLIPTIC OPERATORS OF 2ND ORDER PROCEEDINGS OF THE JAPAN ACADEMY, 1972, 47 : 861 - &
- [48] ON AN APPROACH TO THE STUDY OF QUALITATIVE PROPERTIES OF SOLUTIONS OF NONDIVERGENCE ELLIPTIC-EQUATIONS OF 2ND ORDER MATHEMATICS OF THE USSR-SBORNIK, 1983, 122 (3-4): : 343 - 367