@article{TIMM_1992_2_a5,
     author = {Yu. S. Vasil'ev},
     title = {Approximation by splines with nonfixed knots on a~half-axis depending on the location of the knots},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {57--69},
     publisher = {mathdoc},
     volume = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_1992_2_a5/}
}