@article{MAN_1972__196_162251,
     author = {C.B. Thomas},
     title = {Structures on {Manifolds} {Defined} by {Cross-Sections.}},
     journal = {Mathematische Annalen},
     pages = {163--170},
     publisher = {mathdoc},
     volume = {196},
     year = {1972},
     zbl = {0219.57018},
     url = {http://geodesic.mathdoc.fr/item/MAN_1972__196_162251/}
}