@article{10_4153_CJM_1979_073_5,
     author = {Baird, Bridget B.},
     title = {Inverse {Semigroups} of {Homeomorphisms} are {Hopfian}},
     journal = {Canadian journal of mathematics},
     pages = {800--807},
     year = {1979},
     volume = {31},
     number = {4},
     doi = {10.4153/CJM-1979-073-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-073-5/}
}