1. Lecture at the 12th Winter School of the Leningrad Nuclear Physics Institute;Gribov,1977
2. C.M. Bender, T. Eguchi and H. Pagels, Rockefeller Univ. preprint (1977);
3. Gauge unambiguous quantization of Yang-Mills theory around classical solutions
4. Instantons and transverse pure gauge fields
5. M. Ademollo, E. Napolitano and S. Sciuto, CERN preprint TH.2412 (1977);