Search for evolutionary changes in the periods of cepheids: V1033 Cyg, a classical cepheid at the first crossing of the instability strip - Berdnikov, L. N.; Pastukhova, E. N.; Kovtyukh, V. V.; Lemasle, Bertrand; Kniazev, A. Yu.; Usenko, I. A.; Bono, G.; Grebel, Eva K.; Hajdu, Gergely; Zhuiko, S. V.; Udovichenko, S. N.; Keir, L. E. (Astronomy letters, 2019)
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