@article{JRAM_1980__318_152266,
     author = {J\"urgen Herzog},
     title = {Deformation von {Cohen-Macaulay} {Algebren.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {83--105},
     year = {1980},
     volume = {318},
     zbl = {0425.13005},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1980__318_152266/}
}