@article{iserles:1991:psi,
    author = {Iserles, A. and Koch, P. E. and N{\o}rsett, S. P. and
              Sanz-Serna, J. M.},
     title = {On polynomials orthogonal with respect to certain {S}obolev
              inner products},
   journal = {J. Approx. Theory},
  fjournal = {Journal of Approximation Theory},
    volume = {65},
      year = {1991},
    number = {2},
     pages = {151–175},
      issn = {0021-9045},
     coden = {JAXTAZ},
   mrclass = {42C05 (26C05)},
  mrnumber = {MR1104157 (92b:42029)},
mrreviewer = {R. A. Askey},
       doi = {10.1016/0021-9045(91)90100-O}}