Day, O. (2005). Stable stationary vortices and traveling oscillatory vortices in a stenotic fluid-flow channel. Physical Review E, 72, 067303 : 1 - 5.
Day, O. W. Jr., Pravica, D. W., "Top Resonances in the Gravitational and Electromagnetic Fields Surrounding a Black Hole: A model for Understanding High-Frequency QPOs",AAS Bull.36, No. 3. 1716 (2004).
Pravica, D. W., Day, O. W. Jr., and Brock, R. S., "Methods, System, and Computer Program Products for Analyzing Cardiac Sounds Using Eigenfunctions", United States Provisional Patent Application No. 60/543.037, February 9, 2004.
Day, O. W., Jr., and Pravica, D. W., "Listening For Long-Lived Breathing Modes of Compact Objects",AAS Bull.35, No. 2, 1901 (2003).
Morrison, R.C., Mizell, J. R. Jr., and Day, O. W. Jr., "Generalized overlap amplitudes for the lithium atom.",Inter. J. Quan. Chem.,57, 355(1996).
Day, O.W. Jr., "The extended Koopmans' theorem Fock operator and the generalized overlap amplitude one-electron operator.",Inter. J. Quan. Chem.,57, 391(1996).
Morrison, R.C., Tong, W., and Day, O. W. Jr., "Chemical bonding in the hydrogen molecule.",Inter. J. Quan. Chem.,60, 421 (1996).
Tong, W., Morrison, R. C., and Day, O. W. Jr., "Analysis of chemical bonding in C2 using Dyson orbitals.",Inter. J. Quan. Chem., Quan. Chem. Symp.30, 411 (1996).
Day, O. W. Jr., "A local one-electron operator for the generalized- overlap amplitudes.",Inter. J. Quan. Chem.,56, 547 (1995).