@article{GDZPPN002101416, title = {Semicontinuity of the singularity spectrum.}, journal = {Inventiones mathematicae}, volume = {82}, year = {1985}, pages = {557-566}, zbl = {0568.14021}, url = {http://dml.mathdoc.fr/item/GDZPPN002101416} }
Steenbrink, J.H.M. Semicontinuity of the singularity spectrum.. Inventiones mathematicae, Tome 82 (1985) pp. 557-566. http://gdmltest.u-ga.fr/item/GDZPPN002101416/