@article{SM_2002_193_12_a2,
     author = {V. P. Zastavnyi and R. M. Trigub},
     title = {Positive-definite splines of special form},
     journal = {Sbornik. Mathematics},
     pages = {1771--1800},
     year = {2002},
     volume = {193},
     number = {12},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_12_a2/}
}