@article{MS2_1978__42_166575,
     author = {G.E. Reyes and G.C. Wraith},
     title = {A note on tangent bundles in a category with a ring object.},
     journal = {Mathematica Scandinavica},
     pages = {53--63},
     year = {1978},
     volume = {42},
     zbl = {0392.18011},
     url = {http://geodesic.mathdoc.fr/item/MS2_1978__42_166575/}
}