@article{10_4153_CJM_1973_018_0,
     author = {Bell, Harold and Ungar, Gerald S.},
     title = {From {Path} {Lifting} and {Unique} {Arc} {Lifting} to {Unique} {Path} {Lifting}},
     journal = {Canadian journal of mathematics},
     pages = {204--212},
     year = {1973},
     volume = {25},
     number = {1},
     doi = {10.4153/CJM-1973-018-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-018-0/}
}