@article{VMJ_2004_6_1_a8,
     author = {A. G. Kusraev and S. N. Tabuev},
     title = {On bilinear operators that preserve disjunction},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {58--70},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2004_6_1_a8/}
}