@article{DEMR_2018_9_a6,
     author = {A.-R. K. Ramazanov and V. G. Magomedova},
     title = {Convex interpolation by rational spline functions of class $ C ^ 2 $},
     journal = {Daghestan Electronic Mathematical Reports},
     pages = {62--67},
     publisher = {mathdoc},
     volume = {9},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DEMR_2018_9_a6/}
}