Time-evolution of cascade processes of muonic atoms in hydrogen-helium mixtures V. Bystritsky, W. Czapliński, M. Filipowicz, E. Guła and N. Popov Eur. Phys. J. D, 8 1 (2000) 75-83 Published online: 15 January 2000 DOI: 10.1007/s10053-000-9068-6