@article{RM_1992_47_2_a0,
     author = {Yu. D. Burago and M. L. Gromov and G. Ya. Perel'man},
     title = {A.\,D.~Alexandrov spaces with curvature bounded below},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--58},
     publisher = {mathdoc},
     volume = {47},
     number = {2},
     year = {1992},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1992_47_2_a0/}
}