@article{10_4064_fm_78_2_169_176,
     author = {Helga Schirmer},
     title = {Homotopy for small multifunctions},
     journal = {Fundamenta Mathematicae},
     pages = {169--176},
     publisher = {mathdoc},
     volume = {78},
     number = {2},
     year = {1973},
     doi = {10.4064/fm-78-2-169-176},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-78-2-169-176/}
}