The alpha shape programs are based on the theory of alpha shapes, Delaunay triangulations, and simulated perturbation. The following papers had a significant influence on the program development.
1.
H. Edelsbrunner and E. P. Mucke. Simulation of Simplicity: a technique to cope with degenerate cases in geometric algorithms. ACM Trans. Graphics 9 (1990), 66-104.
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2.
B. Joe. Construction of three-dimensional Delaunay triangulations using local transformations. Comput. Aided Geom. Design 8 (1991), 123-142.
3.
H. Edelsbrunner and E. P. Mucke. Three-dimensional alpha shapes. ACM Trans. Graphics 13 (1994), 43-72.
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4.
H. Edelsbrunner and N. R. Shah. Incremental topological flipping works for regular triangulations. Algorithmica 15 (1996), 223-241.
5.
C. J. A. Delfinado and H. Edelsbrunner. An incremental algorithm for Betti numbers of simplicial complexes on the 3-sphere. Comput. Aided Geom. Design 12 (1995), 771-784.
6.
H. Edelsbrunner and P. Fu. Measuring space filling diagrams and voids. Rept. UIUC-BI-MB-94-01, Beckman Inst., Molecular Biophysics Group, Univ. Illinois at Urbana-Champaign, 1994.
7.
H. Edelsbrunner. The union of balls and its dual shape. Discrete Comput. Geom. 13 (1995), 415-440.
8.
E. P. Mucke. Shapes and Implementations in Three-Dimensional Geometry. PhD Thesis, Rept. UIUCDCS-R-93-1836, Dept. Comput. Sci., Univ. Illinois at Urbana-Champaign, 1993.
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9.
H. Edelsbrunner, M. Facello, P. Fu, and J. Liang. Measuring proteins and voids in proteins. In "Proc. 28th Ann. Hawaii Internat. Conf. System Sci. 1995'', 256-264.
10.
M. A. Facello. Implementation of a randomized algorithm for Delaunay and regular triangulations in three dimensions. Comput. Aided Geom. Design 12 (1995), 349-370.
11.
N. Akkiraju, H. Edelsbrunner, M. Facello, P. Fu, E. P. Mucke, and C. Varela. Alpha shapes: definition and software. In "Proc. Internat. Comput. Geom. Software Workshop 1995'', Minneapolis.
12.
H. Edelsbrunner, M. A. Facello, and J. Liang. On the definition and the construction of pockets in macromolecules. In "Proc. Pacific Sympos. Biocomputing 1996'', World Scientific.
13.
B. Delaunay. Sur la sphère vide. Izvestia Akademii Nauk SSSR, Otdelenie Matematicheskii i Estestvennyka Nauk, 7:793--800, 1934.
14.
H. Edelsbrunner, D. G. Kirkpatrick, and R. Seidel. On the shape of a set of points in the plane. IEEE Transactions on Information Theory, IT-29(4):551--559, 1983.
15.
M. F. Richards. Areas, volumes, packing, and protein structure. Ann. Rev. Biophys. Bioeng., 6:151--176, 1977.
16.
D. P. Dobkin and M. J. Laszlo. Primitives for the manipulation of three-dimensional subdivisions. Algorithmica, 4(1):3--32, 1989.
17.
H. Edelsbrunner. A new approach to rectangle intersections, Part I. International Journal of Computer Mathematics, 13:209--219, 1983.

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