1. Boundary problems for systems with parameters.;Agranovič;Mat. Sb.,1971
2. Elliptic problems with parameter and parabolic problems of general type.;Agranovič;Uspechi Mat. Nauk,1964
3. Singularities of differentiable mappings (Russian).;Arnold,1984
4. Bott periodicty and the index of elliptic operators;Atiyah;Quart. J. Math., Oxford Ser.,1960
5. K-theory.;Attyah,1965