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- [3] DOUGLIS-NIRENBERG ELLIPTIC SYSTEMS IN THE REFINED SCALE OF SPACES ON A CLOSED MANIFOLD METHODS OF FUNCTIONAL ANALYSIS AND TOPOLOGY, 2008, 14 (02): : 142 - 158
- [5] HOMOTYPICAL CLASSIFICATION OF SYSTEMS ELLIPTIC IN DOUGLIS-NIRENBERG SENCE DOKLADY AKADEMII NAUK SSSR, 1975, 225 (06): : 1275 - 1277