Variability of the H2O maser associated with the Mira variable RS VirginisE. E. Lekht, J. E. Mendoza-Torres, G. M. Rudnitskij and A. M. TolmachevA&A, 376 3 (2001) 928-940DOI: https://doi.org/10.1051/0004-6361:20010967