@article{TM_2011_274_a16,
     author = {M. A. Taitslin},
     title = {Comparison of expressive power of some query languages for databases},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {297--313},
     publisher = {mathdoc},
     volume = {274},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2011_274_a16/}
}