Matchings Avoiding Partial Patterns and Lattice Paths. - Vít Jelínek; Nelson Y. Li; Toufik Mansour; Sherry H. F. Yan (Electron. J. Comb., 2006)

The butterfly decomposition of plane trees. - William Y. C. Chen; Nelson Y. Li; Louis W. Shapiro (Discret. Appl. Math., 2007)

Matrix identities on weighted partial Motzkin paths. - William Y. C. Chen; Nelson Y. Li; Louis W. Shapiro; Sherry H. F. Yan (Eur. J. Comb., 2007)

2-Binary trees: Bijections and related issues. - Nancy S. S. Gu; Nelson Y. Li; Toufik Mansour (Discret. Math., 2008)

Staircase tilings and k-Catalan structures. - Silvia Heubach; Nelson Y. Li; Toufik Mansour (Discret. Math., 2008)

An identity involving Narayana numbers. - Nelson Y. Li; Toufik Mansour (Eur. J. Comb., 2008)