@article{MOMA_1964__68_177257,
     author = {Johann B. Leicht},
     title = {\"Uber die elementaren {Lemmata} der homologischen {Algebra} in quasi-exacten {Kategorien.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {240--254},
     publisher = {mathdoc},
     volume = {68},
     year = {1964},
     zbl = {0123.01101},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1964__68_177257/}
}