@article{10_4153_CJM_1967_114_x,
     author = {Haimo, Franklin},
     title = {Extensions of {Endomorphisms} from the {Higher} {Centres}},
     journal = {Canadian journal of mathematics},
     pages = {1250--1258},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-114-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-114-x/}
}