Mixed Hodge structures on log deformations Taro Fujisawa, Chikara Nakayama (2003) Rendiconti del Seminario Matematico della Università di Padova
Monodromy and weight filtration for smoothings of isolated singularities J. H. M. Steenbrink (1995) Compositio Mathematica
Mumford-Tate groups of mixed Hodge structures and the theorem of the fixed part Yves André (1992) Compositio Mathematica