### References

Optimization concepts used in CINTS:

1. J. T. Fermann, Ph.D. Thesis, University of Georgia, 1996.

Recurrence relations for one-electron integrals and electron repulsion integrals (ERIs):

1. S. Obara and A. Saika, J. Chem. Phys. 84, 3963 (1986).

2. M. Head-Gordon and J. A. Pople, J. Chem. Phys. 89, 5777 (1988).

Recurrence relations for integrals of two-electron operators specific to linear R12 theories:

1. W. Klopper and R. Rohse, Theor. Chim. Acta 83, 441 (1992).

2. E. F. Valeev and H. F. Schaefer, J. Chem. Phys. 113, 3990 (2000).

Symmetry-adapted integrals and Pitzer's equal contribution theorem:

1. P. R. Taylor in "Lecture Notes in Quantum Chemistry 58", B. O. Roos (Ed.), Springer-Verlag, 1992.

2. R. Pitzer, J. Chem. Phys. 58, 3111 (1973).

Direct MP2 energy:

1. M. Head-Gordon, J. A. Pople, and M. J. Frisch, Chem. Phys. Lett. 153, 503 (1988).

2. I. M. B. Nielsen, Ph.D. Thesis, Stanford University, 1996.