@article{10_4064_fm_66_2_223_235,
     author = {J. Dugundji},
     title = {Modified {Vietoris} theorems for homotopy},
     journal = {Fundamenta Mathematicae},
     pages = {223--235},
     publisher = {mathdoc},
     volume = {66},
     number = {2},
     year = {1970},
     doi = {10.4064/fm-66-2-223-235},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-66-2-223-235/}
}