Journal of Physics A Mathematical and General
Comments on `The Dalgarno - Lewis method as a perturbation theory' by Nandiet al(1996J. Phys. A: Math. Gen.291101) and on `Alternate approach to non-relativistic perturbation theory' by Kim and Sukhatme (1992J. Phys. A: Math. Gen.25L647)
C. K. Au
Abstract
The Dalgarno - Lewis method as a perturbation theory' by Nandi et al (1996 J. Phys. A: Math. Gen. 29 1101) and on Alternate approach to non-relativistic perturbation theory' by Kim and Sukhatme (1992 J. Phys. A: Math. Gen. 25 L647) , C K Au