%0 Journal Article %A Eng-Ung, Choo %T Note on a Subring of C *(X)(1) %J Canadian mathematical bulletin %D 1975 %P 177-179 %V 18 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-035-4/ %R 10.4153/CMB-1975-035-4 %F 10_4153_CMB_1975_035_4