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Issue No. 06 - November/December (1990 vol. 10)
ISSN: 0272-1716
pp: 65-75
<p>PEX, the PHIGS extension to the X Window System, is evaluated in the context of assumptions inherent in the PHIGS output, modeling, input, user interface, and system environment models. Problems not previously discussed arise when examining PEX this way. The problems not only pertain to the implementation of PEX, but also to implementing a 3-D library in a distributed windowing system in general. The University of Illinois PEX implementation serves as a reference to discuss the solutions proposed.</p>

W. Kubitz, H. C. Sung and G. Rogers, "Standards: A critical evaluation of PEX," in IEEE Computer Graphics and Applications, vol. 10, no. , pp. 65-75, 1990.
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