Structures and lower bounds for binary covering arrays. - Soohak Choi; Hyun Kwang Kim; Dong Yeol Oh (Discret. Math., 2012)

Local duality theorem for q-ary 1-perfect codes. - Soohak Choi; Jong Yoon Hyun; Hyun Kwang Kim (Des. Codes Cryptogr., 2014)

Steganographic schemes from perfect codes on Cayley graphs. - Jon-Lark Kim; Junyong Park 004; Soohak Choi (Des. Codes Cryptogr., 2019)