@article{MZ_1978__163_172751,
     author = {Alfred D. Vella},
     title = {The {Malnormality} of {Certain} {Subgroups} of  {Small} {Cancellation} {Groups.}},
     journal = {Mathematische Zeitschrift},
     pages = {187--190},
     publisher = {mathdoc},
     volume = {163},
     year = {1978},
     zbl = {0372.20024},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__163_172751/}
}