Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MM2_1977__20_154446, author = {Helmut Lenzing and Michael H\"oppner}, title = {Flache und halbinjektive {Funktoren.}}, journal = {Manuscripta mathematica}, pages = {315--322}, publisher = {mathdoc}, volume = {20}, year = {1977}, zbl = {0354.18012}, url = {http://geodesic.mathdoc.fr/item/MM2_1977__20_154446/} }
Helmut Lenzing; Michael Höppner. Flache und halbinjektive Funktoren.. Manuscripta mathematica, Tome 20 (1977), pp. 315-322. http://geodesic.mathdoc.fr/item/MM2_1977__20_154446/