Mixed methods on quadrilaterals and hexahedra. - Philip T. Keenan (Numer. Algorithms, 1994)

Enhanced Cell-Centered Finite Differences for Elliptic Equations on General Geometry. - Todd Arbogast; Clint Dawson 001; Philip T. Keenan; Mary F. Wheeler; Ivan Yotov (SIAM J. Sci. Comput., 1998)

Superconvergence and Postprocessing of Fluxes from Lowest-Order Mixed Methods on Triangles and Tetrahedra. - Todd F. Dupont; Philip T. Keenan (SIAM J. Sci. Comput., 1998)

General Motors Optimizes Vehicle Content for Customer Value and Profitability. - Peiling Wu-Smith; Philip T. Keenan; Jonathan H. Owen; Andrew Norton; Kelly Kamm; Kathryn M. Schumacher; Peter A. Fenyes; Don Kiggins; Philip W. Konkel; William Rosen; Kurt Schmitter; Sharon Sheremet; et al. (INFORMS J. Appl. Anal., 2023)