@article{10_4153_CJM_1978_050_5,
     author = {Whitehead, Jennifer},
     title = {On {Certain} {Properties} of {Subnormal} {Subgroups}},
     journal = {Canadian journal of mathematics},
     pages = {573--582},
     year = {1978},
     volume = {30},
     number = {3},
     doi = {10.4153/CJM-1978-050-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1978-050-5/}
}