Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1966_4_a12, author = {V. V. Rozen}, title = {Partial idempotent operatives associated with ordered sets}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {96--103}, publisher = {mathdoc}, number = {4}, year = {1966}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1966_4_a12/} }
V. V. Rozen. Partial idempotent operatives associated with ordered sets. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1966), pp. 96-103. http://geodesic.mathdoc.fr/item/IVM_1966_4_a12/