共 18 条
[2]
LOWER BOUNDS FOR EIGENVALUES WITH APPLICATION TO THE HELIUM ATOM
[J].
PHYSICAL REVIEW,
1960, 120 (01)
:144-149
[4]
Birman M. Sh., 1966, AM MATH SOC TRANSL, V53, P23
[7]
GROUND-STATE AND ELASTIC PHASE-SHIFT OF ELECTRON-HYDROGEN SYSTEM STUDIED IN HYPERSPHERICAL COORDINATES
[J].
PHYSICAL REVIEW A,
1975, 12 (02)
:493-497
[10]
SIMON B, 1970, HELV PHYS ACTA, V43, P607