Birget-Rhodes Expansion of Groups and Inverse Monoids of MöBius Type. - Keunbae Choi; Yongdo Lim (Int. J. Algebra Comput., 2002)

Transitive partial actions of groups. - Keunbae Choi; Yongdo Lim (Period. Math. Hung., 2008)

Möbius and triangle semigroups. - Keunbae Choi; Yongdo Lim (Period. Math. Hung., 2010)