@article{GDZPPN002200503, title = {Hodge groups of K3 surfaces.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, volume = {341}, year = {1983}, pages = {193-220}, zbl = {0506.14034}, url = {http://dml.mathdoc.fr/item/GDZPPN002200503} }
Zarhin, Yu.G. Hodge groups of K3 surfaces.. Journal für die reine und angewandte Mathematik, Tome 341 (1983) pp. 193-220. http://gdmltest.u-ga.fr/item/GDZPPN002200503/