@article{10_4153_CJM_2012_024_0,
     author = {Godinho, Leonor and Sousa-Dias, M. E.},
     title = {Addenda and {Errata} to {{\textquotedblleft}The} {Fundamental} {Group} of {S1-manifolds{\textquotedblright}}},
     journal = {Canadian journal of mathematics},
     pages = {553--558},
     year = {2013},
     volume = {65},
     number = {3},
     doi = {10.4153/CJM-2012-024-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2012-024-0/}
}