@article{IM2_2008_72_1_a2,
     author = {O. N. German and E. L. Lakshtanov},
     title = {On a multidimensional generalization of {Lagrange's} theorem on continued fractions},
     journal = {Izvestiya. Mathematics },
     pages = {47--61},
     publisher = {mathdoc},
     volume = {72},
     number = {1},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2008_72_1_a2/}
}