@article{10_4064_ap_37_1_49_57,
     author = {B. Walczak},
     title = {A necessary and sufficient condition for the existence of a bundle in differential spaces},
     journal = {Annales Polonici Mathematici},
     pages = {49--57},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1980},
     doi = {10.4064/ap-37-1-49-57},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-37-1-49-57/}
}