@article{SM_2002_193_2_a3,
     author = {P. E. Markov and O. Trejos},
     title = {On the rigidity of a~glued piecewise convex surface},
     journal = {Sbornik. Mathematics},
     pages = {231--246},
     year = {2002},
     volume = {193},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2002_193_2_a3/}
}