Multiwavelength evidence for a 15-year periodic activity in the symbiotic nova V1016 Cygni Š. Parimucha, D. Chochol, T. Pribulla, L. M. Buson and A. A. Vittone A&A, 391 3 (2002) 999-1004 Published online: 09 August 2002 DOI: 10.1051/0004-6361:20020847