@article{IM_1980__58_142718,
     author = {Wolfgang K\"uhnel},
     title = {Tight and {0-Tight} {Polyhedral} {Embeddings} of {Surfaces.}},
     journal = {Inventiones mathematicae},
     pages = {161--178},
     publisher = {mathdoc},
     volume = {58},
     year = {1980},
     zbl = {0432.53041},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__58_142718/}
}