@article{BMMS_2006_29_2_a1,
     author = {P.C. Wong and K.B. Wong},
     title = {The {Cyclic} {Subgroup} {Separability} of {Certain} {HNN} {Extensions}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2006},
     volume = {29},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2006_29_2_a1/}
}