Abstract
An updated period study of XX Leonis gives a revised period,P = 0 d. 970939, and indicates constancy of the period since its earliest observation.
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Srivastava, R.K. Constancy of period in XX Leonis. Astrophys Space Sci 219, 291–294 (1994). https://doi.org/10.1007/BF00628246
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DOI: https://doi.org/10.1007/BF00628246