TY - JOUR AU - M. A. Taitslin TI - Comparison of expressive power of some query languages for databases JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 2011 SP - 297 EP - 313 VL - 274 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_2011_274_a16/ LA - ru ID - TM_2011_274_a16 ER -