@article{RM_2007_62_1_a0,
     author = {A. I. Bobenko and Yu. B. Suris},
     title = {On organizing principles of discrete differential geometry. {Geometry} of spheres},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--43},
     publisher = {mathdoc},
     volume = {62},
     number = {1},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2007_62_1_a0/}
}