@article{IM2_1981_16_1_a5,
     author = {M. Kh. Gizatullin},
     title = {Rational $G$-surfaces},
     journal = {Izvestiya. Mathematics },
     pages = {103--134},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1981_16_1_a5/}
}