@article{10_4153_CJM_1979_012_x,
     author = {Hoare, A. H. M.},
     title = {Coinitial {Grapfis} and {Whitehead} {Automorphisms}},
     journal = {Canadian journal of mathematics},
     pages = {112--123},
     year = {1979},
     volume = {31},
     number = {1},
     doi = {10.4153/CJM-1979-012-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-012-x/}
}