@article{DAN_1964_156_6_a12,
     author = {B. M. Shain},
     title = {Involutary semigroups of complete binary relations},
     journal = {Doklady Akademii Nauk},
     pages = {1300--1303},
     publisher = {mathdoc},
     volume = {156},
     number = {6},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_6_a12/}
}