F. Gounand, Calculation of radial matrix elements and radiative lifetimes for highly excited states of alkali atoms using the Coulomb approximation, Journal de Physique, vol.40, issue.5, p.457, 1979.
DOI : 10.1051/jphys:01979004005045700

URL : https://hal.archives-ouvertes.fr/jpa-00209126

I. M. Aymar, Luc-Kocnmg and I;. Comber-Carnow, J. Phys, pp.9-1279, 1976.

I. Phys, A. A. Hllhajlov, and R. K. Janev, Bi3 (198a) i631: ' 1141, J Phys, vol.814, p.1639