@article{IVM_1977_1_a18,
     author = {A. A. Ligun and A. D. Malysheva},
     title = {The deviation of spline functions that are obtained by averaging piecewise linear functions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {137--140},
     publisher = {mathdoc},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1977_1_a18/}
}