@article{783956, author = {B Drake and William Martin}, title = {Ionization Energies and Quantum Electrodynamic Effects in the Lower 1 sns and 1 snp Levels of Neutral Helium (4HeI)}, year = {1998}, number = {76}, month = {1998-07-01 00:07:00}, publisher = {Canadian Journal of Physics}, language = {en}, }