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@article{DCG_1994__12_1_131322, author = {M. Sharir and B. Aronov}, title = {Castles in the {Air} {Revisited.}}, journal = {Discrete & computational geometry}, pages = {119--150}, publisher = {mathdoc}, volume = {12}, number = {1}, year = {1994}, zbl = {0805.52005}, url = {http://geodesic.mathdoc.fr/item/DCG_1994__12_1_131322/} }
M. Sharir; B. Aronov. Castles in the Air Revisited.. Discrete & computational geometry, Tome 12 (1994) no. 1, pp. 119-150. http://geodesic.mathdoc.fr/item/DCG_1994__12_1_131322/