@article{DAN_1996_348_5_a12,
     author = {B. A. Kagan},
     title = {On tidal variations of the length of day, year and synodic month},
     journal = {Doklady Akademii Nauk},
     pages = {673--676},
     year = {1996},
     volume = {348},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_348_5_a12/}
}