@article{SM_2010_201_1_a0,
     author = {I. V. Arzhantsev and S. A. Gaifullin},
     title = {Cox rings, semigroups and automorphisms of affine algebraic varieties},
     journal = {Sbornik. Mathematics},
     pages = {1--21},
     year = {2010},
     volume = {201},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2010_201_1_a0/}
}