@article{EXMATH_1996_1996_1_a31,
     author = {Orta\c{c}gil, Erc\"ument},
     title = {Observaciones sobre los s{\'\i}mbolos de {Christoffel} de {E-conexiones} de {Ehresmann.}},
     journal = {Extracta mathematicae},
     pages = {172-180},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1996_1996_1_a31/}
}