Neutral and ionized emission lines in the type II Cepheid W Virginis V. V. Kovtyukh, G. Wallerstein, S. M. Andrievsky, D. Gillet, A. B. Fokin, M. Templeton and A. A. Henden A&A, 526 (2011) A116 Published online: 10 January 2011 DOI: 10.1051/0004-6361/201015912