@article{SM_2000_191_4_a5,
     author = {P. E. Markov and E. V. Shkryl'},
     title = {Rigidity of piecewise convex surfaces of torus type},
     journal = {Sbornik. Mathematics},
     pages = {583--617},
     publisher = {mathdoc},
     volume = {191},
     number = {4},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_4_a5/}
}