2010. A Modification of Atomic Orbital Theory and Its Application to $(1snl)^1L^{\pi}$ and $(nl^2)L^{\pi}$ Excited States of He-Like Ions. Journal of Atomic and Molecular Sciences. 1, 2 (Jan. 2010), 103–117. DOI:https://doi.org/10.4208/jams.022510.031010a.