@article{IM2_1970_4_3_a9,
     author = {G. K. Lebed'},
     title = {On quadrature formulas with smallest bound for the remainder on certain classes of {functions.~II}},
     journal = {Izvestiya. Mathematics },
     pages = {645--669},
     publisher = {mathdoc},
     volume = {4},
     number = {3},
     year = {1970},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1970_4_3_a9/}
}