@article{10_4153_CJM_1968_131_5,
     author = {Gupta, N. D. and Newman, M. F.},
     title = {Engel {Congruences} in {Groups} of {Prime-Power} {Exponent}},
     journal = {Canadian journal of mathematics},
     pages = {1321--1323},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-131-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-131-5/}
}