%0 Journal Article %A Wong Peng Choon %A Gan Hui Woan %T Cyclic Subgroup Separability of Certain HNN Extensions %J Bulletin of the Malaysian Mathematical Society %D 1999 %V 22 %N 2 %U http://geodesic.mathdoc.fr/item/BMMS_1999_22_2_a6/ %F BMMS_1999_22_2_a6