@article{MAT_1970_14_2_a3,
     author = {N. M. Katz and T. Oda},
     title = {On the differentiation of de {Rham} cohomology classes with respect to parameters},
     journal = {Matematika},
     pages = {91--101},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1970_14_2_a3/}
}