How Sparse Can a Matrix with Orthogonal Rows Be? - Gi-Sang Cheon; Bryan L. Shader (J. Comb. Theory A, 1999)

Sparse orthogonal matrices and the Haar wavelet. - Gi-Sang Cheon; Bryan L. Shader (Discret. Appl. Math., 2000)

A note on the Bernoulli and Euler polynomials. - Gi-Sang Cheon (Appl. Math. Lett., 2003)

A connection between a generalized Pascal matrix and the hypergeometric function. - Moawwad E. A. El-Mikkawy; Gi-Sang Cheon (Appl. Math. Lett., 2003)

Root Polynomials to and From Permanents. - Gi-Sang Cheon; Suk-Geun Hwang; Seok-Zun Song (Discret. Math., 2003)

Extended symmetric Pascal matrices via hypergeometric functions. - Gi-Sang Cheon; Moawwad E. A. El-Mikkawy (Appl. Math. Comput., 2004)

Combinatorial and hypergeometric identities via the Legendre polynomials–A computational approach. - Moawwad E. A. El-Mikkawy; Gi-Sang Cheon (Appl. Math. Comput., 2005)

Several polynomials associated with the harmonic numbers. - Gi-Sang Cheon; Suk-Geun Hwang; Sang-Gu Lee (Discret. Appl. Math., 2007)

An interpretation of the Dittert conjecture in terms of semi-matchings. - Gi-Sang Cheon; Ian M. Wanless (Discret. Math., 2007)

Protected points in ordered trees. - Gi-Sang Cheon; Louis W. Shapiro (Appl. Math. Lett., 2008)

Riordan group involutions and the Delta-sequence. - Gi-Sang Cheon; Sung-Tae Jin; Hana Kim; Louis W. Shapiro (Discret. Appl. Math., 2009)

A generalization of Lucas polynomial sequence. - Gi-Sang Cheon; Hana Kim; Louis W. Shapiro (Discret. Appl. Math., 2009)

The Fine numbers refined. - Gi-Sang Cheon; Sang-Gu Lee; Louis W. Shapiro (Eur. J. Comb., 2010)

On the conjecture for certain Laplacian integral spectrum of graphs. - Kinkar Chandra Das; Sang-Gu Lee; Gi-Sang Cheon (J. Graph Theory, 2010)

Rational combinations for the sums involving inverse binomial coefficients. - Gi-Sang Cheon; Toufik Mansour (Appl. Math. Comput., 2011)

The hitting time subgroup, Lukasiewicz paths and Faber polynomials. - Gi-Sang Cheon; Hana Kim; Louis W. Shapiro (Eur. J. Comb., 2011)

The uplift principle for ordered trees. - Gi-Sang Cheon; Louis W. Shapiro (Appl. Math. Lett., 2012)

r-Whitney numbers of Dowling lattices. - Gi-Sang Cheon; Ji-Hwan Jung (Discret. Math., 2012)

Combinatorics of Riordan arrays with identical A and Z sequences. - Gi-Sang Cheon; Hana Kim; Louis W. Shapiro (Discret. Math., 2012)

Generalized Bessel numbers and some combinatorial settings. - Gi-Sang Cheon; Ji-Hwan Jung; Louis W. Shapiro (Discret. Math., 2013)

An application of Riordan arrays to the transient analysis of M/M/1 queues. - Gi-Sang Cheon; Bong Dae Choi; Sung-Tae Jin (Appl. Math. Comput., 2014)

Word-representability of Toeplitz graphs. - Gi-Sang Cheon; Jinha Kim; Minki Kim; Sergey Kitaev (Discret. Appl. Math., 2019)

Counting independent sets in Riordan graphs. - Gi-Sang Cheon; Ji-Hwan Jung; Bumtle Kang; Hana Kim; Suh-Ryung Kim; Sergey Kitaev; Seyed Ahmad Mojallal (Discret. Math., 2020)

Enumeration of bipartite non-crossing geometric graphs. - Gi-Sang Cheon; Hong Joon Choi; Guillermo Esteban; Minho Song (Discret. Appl. Math., 2022)

Structural properties of Toeplitz graphs. - Seyed Ahmad Mojallal; Ji-Hwan Jung; Gi-Sang Cheon; Suh-Ryung Kim; Bumtle Kang (Discret. Math., 2022)

On naturally labelled posets and permutations avoiding 12-34. - David I. Bevan; Gi-Sang Cheon; Sergey Kitaev (Eur. J. Comb., 2025)