@article{10_4153_CJM_1977_001_4,
     author = {Lane, Norman D. and Scherk, Peter and Turgeon, Jean M.},
     title = {Quasigraphs},
     journal = {Canadian journal of mathematics},
     pages = {1--28},
     year = {1977},
     volume = {29},
     number = {1},
     doi = {10.4153/CJM-1977-001-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-001-4/}
}