@article{1183530203, author = {Corner, A. L. S.}, title = {Additive categories and a theorem of W. G. Leavitt}, journal = {Bull. Amer. Math. Soc.}, volume = {75}, number = {5}, year = {1969}, pages = { 78-82}, language = {en}, url = {http://dml.mathdoc.fr/item/1183530203} }
Corner, A. L. S. Additive categories and a theorem of W. G. Leavitt. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 78-82. http://gdmltest.u-ga.fr/item/1183530203/