TY - Chin. Phys. B A1 - Serpil Şakiroĝlu, Kadir Akgüngör, and ìsmail Sökmen T1 - Ground state energy of He isoelectronic sequence treated variationally via Hylleraas-like wavefunction Y1 - 2009-06-20 JF - Chinese Physics B JO - Chin. Phys. B SP - 2238 EP - 2243 VL - 18 IS - 6 UR - https://cpb.iphy.ac.cn N1 - 10.1088/1674-1056/18/6/022 ER -