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- [21] INITIAL BOUNDARY-VALUE PROBLEM FOR A 2ND-ORDER MULTIDIMENSIONAL SYSTEM OF COMPOSITE TYPE DOKLADY AKADEMII NAUK SSSR, 1983, 271 (06): : 1298 - 1302
- [22] THE 3RD BOUNDARY-VALUE PROBLEM FOR 2ND-ORDER LINEAR ELLIPTIC-EQUATIONS DOKLADY AKADEMII NAUK SSSR, 1981, 261 (02): : 278 - 282