@article{10_4064_fm_115_3_207_212,
     author = {David Sprows},
     title = {Homeotopy groups of punctured spheres with holes},
     journal = {Fundamenta Mathematicae},
     pages = {207--212},
     publisher = {mathdoc},
     volume = {115},
     number = {3},
     year = {1983},
     doi = {10.4064/fm-115-3-207-212},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-115-3-207-212/}
}