@article{ISU_2009_9_3_a8,
     author = {V. E. Novikov},
     title = {Set-theoretical approach to the structure of concept generators},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {50--56},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2009_9_3_a8/}
}