@article{IM_1978__44_142520,
     author = {Niels Nygaard},
     title = {On the {Fundamental} {Group} of a {Unirational} {3-Fold.}},
     journal = {Inventiones mathematicae},
     pages = {75--86},
     publisher = {mathdoc},
     volume = {44},
     year = {1978},
     zbl = {0427.14014},
     url = {http://geodesic.mathdoc.fr/item/IM_1978__44_142520/}
}