@article{IM_1985__80_143242,
     author = {Joseph Steenbrink and Steven Zucker},
     title = {Variation of mixed {Hodge} structure. {I.}},
     journal = {Inventiones mathematicae},
     pages = {489--542},
     publisher = {mathdoc},
     volume = {80},
     year = {1985},
     zbl = {0626.14007},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__80_143242/}
}