A genetic algorithms for on-line calculation with application to system theory. - Hong-Gi Lee; Jin-Man Hong; Hoon Kang; Kwee-Bo Sim (FUZZ-IEEE, 2009)

Algebraic conditions for state equivalence to a discrete-time nonlinear observer canonical form. - Hong-Gi Lee; Jin-Man Hong (Syst. Control. Lett., 2011)

Discrete-Time Observer Error Linearizability via Restricted Dynamic Systems. - Hong-Gi Lee; Jin-Man Hong (IEEE Trans. Autom. Control., 2012)