1. For recent reviews of muon and pion transfer processes see ref. (1,2).
2. S. S. Gershtein andL. I. Ponomarev:Mesomolecular processes induced by μ −-andπ −-mesions, inMuon Physics, edited byV. W. Hughes andC. S. Wu, Chap. VII (New York, N. Y., 1975).
3. G. Fiorentini andG. Torelli:Muon and pion transfer processes, Pisa preprint (1975) (revised version in preparation).
4. S. S. Gershtein:Žurn. Ėksp. Teor. Fiz.,43, 706 (1962) (English translation:Sov. Phys. JETP,16, 501 (1962)).
5. L. I. Ponomarev andT. P. Puzynina:Žurn. Ėksp. Teor. Fiz.,52, 1273 (1967) (English translation:Sov. Phys. JETP,25, 846 (1967)).