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Published online by Cambridge University Press: 14 August 2015
Observations of some RR Lyrae stars with varying periods and shapes of the light curves were discussed. These are:
TU Com (Ureche, V., 1965)
WY Dra (Chis, D., Chis, G. H., and Mihoc, I. (1974))
SW Psc (Ureche, V. (1971a, b))