@article{IVM_1969_12_a6,
     author = {N. E. Lu\v{s}paǐ},
     title = {Best quadrature formulae for certain classes of functions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {53--59},
     publisher = {mathdoc},
     number = {12},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1969_12_a6/}
}