@article{RM_2004_59_5_a8,
     author = {O. N. Karpenkov},
     title = {Two-dimensional continued fractions of hyperbolic integer matrices
},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {959--960},
     publisher = {mathdoc},
     volume = {59},
     number = {5},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2004_59_5_a8/}
}