@article{ZNSL_2009_367_a1,
     author = {Yu. K. Demjanovich and O. M. Kosogorov},
     title = {Splines and biorthogonal systems},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {9--26},
     year = {2009},
     volume = {367},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2009_367_a1/}
}