@article{CM_1936__3__453_0,
     author = {Thomas, T. Y.},
     title = {Fields of parallel vectors in the large},
     journal = {Compositio Mathematica},
     pages = {453--468},
     publisher = {Johnson Reprint Corporation},
     volume = {3},
     year = {1936},
     zbl = {0015.12604},
     language = {en},
     url = {http://www.numdam.org/item/CM_1936__3__453_0/}
}