@article{MM_1994_6_4_a7,
     author = {N. N. Kalitkin and L. V. Kuzmina},
     title = {Natural interpolate splines},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {77--114},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1994_6_4_a7/}
}