Properties and nature of Be stars - XXI. The long-term and the orbital variations of = 59 CygP. Harmanec, H. Božić, J. R. Percy, S. Yang, D. Ruždjak, D. Sudar, M. Wolf, L. Iliev, L. Huang, C. Buil and P. EenensA&A, 387 2 (2002) 580-594DOI: https://doi.org/10.1051/0004-6361:20020453
