Problem 10794. - David S. Hough; Rodica Simion (Am. Math. Mon., 2000)

Divisors of Generalized Catalan Numbers: 10794. - David S. Hough; Rodica Simion; Ali Ekber Gürel (Am. Math. Mon., 2002)

Descents in Noncrossing Trees. - David S. Hough (Electron. J. Comb., 2003)