G. Carlsson, A. Zomorodian, A. Collins, and L. Guibas. Symposium on Geometry Processing, volume 71 of ACM International Conference Proceeding Series, page 124-135. Eurographics Association, (2004)
A. Collins, and D. Ball. Ontology, Epistemology, and Teleology for Modeling and Simulation, volume 44 of Intelligent Systems Reference Library, Springer, (2013)