A spanning tree of the 2m-dimensional hypercube with maximum number of degree-preserving vertices. - Sul-Young Choi; Puhua Guan (Discret. Math., 1993)

Large Maximal {0, 1, 2, ..., t}-cliques of theq-analog of the Johnson Graph. - Sul-Young Choi (Eur. J. Comb., 1996)

Construction of a family of graphs with a small induced proper subgraph with minimum degree 3. - Sul-Young Choi; Puhua Guan (Discret. Math., 2007)

On central-peripheral appendage numbers of uniform central graphs. - Sul-Young Choi; Jonathan Needleman (Electron. J. Graph Theory Appl., 2020)