@article{IM2_1993_41_3_a2,
     author = {S. A. Gritsenko},
     title = {Three additive problems},
     journal = {Izvestiya. Mathematics},
     pages = {447--464},
     year = {1993},
     volume = {41},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1993_41_3_a2/}
}