@article{DAN_1964_154_3_a13,
     author = {L. N. Shevrin},
     title = {Projectivities of semi-lattices},
     journal = {Doklady Akademii Nauk},
     pages = {538--541},
     publisher = {mathdoc},
     volume = {154},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_154_3_a13/}
}