RESEARCH OF THE LONG-TERM BEHAVIOUR OF THE PLEIADES BY USING OF PHOTOGRAPHIC PLATES FROM UKRVO DIGITAL ARCHIVE AND BALDONE OBSERVATORY Journal title: Odessa Astronomical Publications Authors: L.V. Kazantseva, V.M. Andruk, S.V. Shatokhina, Yu.I. Protsyuk, I. Eglitis, M. Eglite Subject(s):