@article{IM2_1991_37_1_a7,
     author = {S. G. Tankeev},
     title = {K3 surfaces over number fields and the {Mumford--Tate} conjecture},
     journal = {Izvestiya. Mathematics },
     pages = {191--208},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1991_37_1_a7/}
}