\begin{thebibliography}{10}

\bibitem{asinowski.mansour:dyck}
Andrei Asinowski and Toufik Mansour.
\newblock Dyck paths with coloured ascents.
\newblock {\em European Journal of Combinatorics} {\bf 29}(5) (2008),
  1262--1279.

\bibitem{chaumont.viennot:polynomes}
M.~Vauchassade~de Chaumont and G{\'e}rard Viennot.
\newblock Polyn{\^o}mes orthogonaux et probl{\`e}mes d'{\'e}num{\'e}ration en
  biologie mol{\'e}culaire.
\newblock {\em S{\'e}minaire Lotharingien de Combinatoire} {\bf 8} (1984),
  article B08l, 8 pp.

\bibitem{chen.deng.ea:crossings}
William Y.~C. Chen, Eva Y.~P. Deng, Rosena R.~X. Du, Richard~P. Stanley, and
  Catherine~H. Yan.
\newblock Crossings and nestings of matchings and partitions.
\newblock {\em Transactions of the American Mathematical Society} {\bf 359}(4)
  (2007), 1555--1575 (electronic).

\bibitem{deutsch:bijective}
Emeric Deutsch.
\newblock A bijective proof of the equation linking the {S}chr{\"o}der numbers,
  large and small.
\newblock {\em Discrete Mathematics} {\bf 241}(1-3) (2001), 235--240.

\bibitem{drake.kim:k-distant}
Dan Drake and Jang~Soo Kim.
\newblock $k$-distant crossings and nestings of matchings and partitions.
\newblock {\em DMTCS Proceedings} {\bf AK} (2009), 349--360.

\bibitem{kim.zeng:combinatorics}
Dongsu Kim and Jiang Zeng.
\newblock Combinatorics of generalized {T}chebycheff polynomials.
\newblock {\em European Journal of Combinatorics} {\bf 24}(5) (2003), 499--509.

\bibitem{mansour.deng.ea:dyck}
Toufik Mansour, Eva Y.~P. Deng, and Rosena R.~X. Du.
\newblock Dyck paths and restricted permutations.
\newblock {\em Discrete Applied Mathematics} {\bf 154}(11) (2006), 1593--1605.

\bibitem{sloane:on-line}
N.~J. A.~Sloane (ed.).
\newblock The on-line encyclopedia of integer sequences, 2010.

\bibitem{stein.waterman:new}
P.~R. Stein and M.~S. Waterman.
\newblock On some new sequences generalizing the {C}atalan and {M}otzkin
  numbers.
\newblock {\em Discrete Mathematics} {\bf 26}(3) (1979), 261--272.

\bibitem{sulanke:narayana}
Robert~A. Sulanke.
\newblock The {N}arayana distribution.
\newblock {\em Journal of Statistical Planning and Inference} {\bf 101}(1-2)
  (2002), 311--326.

\bibitem{sulanke:objects}
Robert~A. Sulanke.
\newblock Objects counted by the central {D}elannoy numbers.
\newblock {\em Journal of Integer Sequences} {\bf 6}(1) (2003), Article 03.1.5,
  19 pp. (electronic).

\bibitem{viennot:combinatorial}
G\'erard Viennot.
\newblock A combinatorial theory for general orthogonal polynomials with
  extensions and applications.
\newblock In {\em Orthogonal polynomials and applications (Bar-le-Duc, 1984)},
  Vol. 1171 of {\em Lecture Notes in Mathematics}, pp.  139--157, Berlin, 1985.
  Springer.

\bibitem{viennot:theorie}
G\'erard Viennot.
\newblock Une th\'eorie combinatoire des p\^olynomes othogonaux generaux.
\newblock Notes from a conference at the Universit\'e du Qu\'ebec \`a
  Montr\'eal, Sep 1983.

\end{thebibliography}
