@article{10_4064_cm_53_2_199_204,
     author = {Mary-Elizabeth Hamstrom},
     title = {Homeotopy groups of 3-manifolds---an isomorphism theorem},
     journal = {Colloquium Mathematicum},
     pages = {199--204},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1987},
     doi = {10.4064/cm-53-2-199-204},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-53-2-199-204/}
}