@article{JRAM_1988__389_153052,
     author = {L\^e Dung Tr\'ang and Helmut H. Hamm},
     title = {Local generalizations of {Lefschetz-Zariski} theorems.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {157--189},
     publisher = {mathdoc},
     volume = {389},
     year = {1988},
     zbl = {0646.14012},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1988__389_153052/}
}