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@article{MZ_1970__113_171282, author = {Hans-Berndt Brinkmann}, title = {Addition von {Korrespondenzen} in abelschen {Kategorien.}}, journal = {Mathematische Zeitschrift}, pages = {344--352}, publisher = {mathdoc}, volume = {113}, year = {1970}, zbl = {0194.01703}, url = {http://geodesic.mathdoc.fr/item/MZ_1970__113_171282/} }
Hans-Berndt Brinkmann. Addition von Korrespondenzen in abelschen Kategorien.. Mathematische Zeitschrift, Tome 113 (1970), pp. 344-352. http://geodesic.mathdoc.fr/item/MZ_1970__113_171282/