D. Frye

Gaussian functions in Hylleraas‐configuration interaction calculations. II. Potential curves for the b 3Σ+u and the e 3Σ+u states of hydrogen

E. Clementi, George C. Lie, D. Frye, 1989 .

Selected topics in ab initio computational chemistry in both very small and very large chemical systems

Antonio Rizzo, Bradley P. Feuston, Enrico Clementi, 1991 .