@article{bwmeta1.element.bwnjournal-article-cmv18i1n31, author = {Roman Sikorski}, title = {Abstract covariant derivative}, journal = {Colloquium Mathematicae}, volume = {18}, year = {1967}, pages = {251-272}, zbl = {0162.25101}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-cmv18i1n31} }
Roman Sikorski. Abstract covariant derivative. Colloquium Mathematicae, Tome 18 (1967) pp. 251-272. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-cmv18i1n31/