@article{DM_1991_3_2_a4,
     author = {\`E. \`E. Gasanov},
     title = {On a~mathematical information search mode},
     journal = {Diskretnaya Matematika},
     pages = {69--76},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1991_3_2_a4/}
}