@article{TIMM_2012_18_4_a12,
     author = {Yu. S. Volkov and V. T. Shevaldin},
     title = {Shape preserving conditions for quadratic spline interpolation in the sense of {Subbotin} and {Marsden}},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {145--152},
     year = {2012},
     volume = {18},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_4_a12/}
}