@article{10_4153_CJM_1968_050_0,
     author = {Neumann, B. H.},
     title = {Some {Remarks} on {Semigroup} {Presentations:} {Corrigendum} and {Addendum}},
     journal = {Canadian journal of mathematics},
     pages = {511--511},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-050-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-050-0/}
}