On M-ideals in B( ∑ i = 1 ∞ ⊕ p ℓ r n i ) . Cho, Chong-Man — 1987 International Journal of Mathematics and Mathematical Sciences
Spaces of compact operators which are M -ideals in L ( X , Y ) . Cho, Chong-Man — 1992 International Journal of Mathematics and Mathematical Sciences
A note on M -ideals in certain algebras of operators. Cho, Chong-Man; Roh, Woo Suk — 2000 International Journal of Mathematics and Mathematical Sciences