Ground state energy of He isoelectronic sequence treated variationally via Hylleraas-like wavefunction
Serpil?akiro?lu, KadirAkgüng?r, ?smailS?kmen
Ground state energy of He isoelectronic sequence treated variationally via Hylleraas-like wavefunction
Serpil Şakiroĝlu, Kadir Akgüngör, and ìsmail Sökmen
中国物理B . 2009, (6): 2238 -2243 .  DOI: 10.1088/1674-1056/18/6/022