Physical Review A
An asymptotic-expansion method is presented for the evaluation of correlated three-electron integrals arising in Hylleraas-type variational calculations for lithium and other many-electron atoms. The method proves to be very efficient in accelerating the rate of convergence of an infinite series representation of the integrals. An analytic expression for the terms in the series is derived. © 1995 The American Physical Society.
Drake, Gordon W. F. and Yan, Z. C.. (1995). Asymptotic-expansion method for the evaluation of correlated three-electron integrals. Physical Review A, 52 (5), 3681-3685.