@article{DE_1989_25_7_a8,
     author = {R. M. Aliev},
     title = {Optimal quadrature formulas on the solution sets of boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1161--1171},
     publisher = {mathdoc},
     volume = {25},
     number = {7},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_7_a8/}
}