@article{BAG_2001__42_1_222983,
     author = {Schicho, Josef},
     title = {The multiple conical surfaces.},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {71},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {2001},
     zbl = {0987.14005},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/BAG_2001__42_1_222983/}
}