@article{VMJ_2008_10_3_a5,
     author = {M. A. Pliev},
     title = {The shadow of a bilinear regular operator},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {40--45},
     year = {2008},
     volume = {10},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2008_10_3_a5/}
}