@article{10_4153_CJM_1990_056_4,
     author = {Maj, M. and Stonehewer, S. E.},
     title = {Non-Nilpotent {Groups} in {Which} {Every} {Product} of {Four} {Elements} {Can} be {Reordered}},
     journal = {Canadian journal of mathematics},
     pages = {1053--1066},
     year = {1990},
     volume = {42},
     number = {6},
     doi = {10.4153/CJM-1990-056-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-056-4/}
}