@article{DCG_1991__6_4_131156,
     author = {J.E. Taylor},
     title = {On the {Global} {Structure} of {Crystalline} {Surfaces.}},
     journal = {Discrete & computational geometry},
     pages = {225--262},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1991},
     zbl = {0725.53012},
     url = {http://geodesic.mathdoc.fr/item/DCG_1991__6_4_131156/}
}