@article{etna_vol24_pp108-180,
  author  = {N. M. Atakishiyev and U. Klimyk},
  title   = {Duality of $q$-polynomials, orthogonal on countable sets of points},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {24},
  year    = {2006},
  pages   = {108--180},
}