@article{ETNA_1999__9__a7,
     author = {Garc{\'\i}a-Caballero, Esther M. and P\'erez, Teresa E. and Pi\~nar, Miguel A.},
     title = {Sobolev orthogonal polynomials: {Interpolation} and approximation},
     journal = {Electronic transactions on numerical analysis},
     pages = {56--64},
     publisher = {mathdoc},
     volume = {9},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_1999__9__a7/}
}