@article{UMJ_2017_3_1_a7,
     author = {Elena V. Strelkova},
     title = {Approximation by local parabolic splines constructed on the basis of interpolationin the mean},
     journal = {Ural mathematical journal},
     pages = {81--94},
     year = {2017},
     volume = {3},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UMJ_2017_3_1_a7/}
}