@Article{ SÁNCHEZ-DEHESA_ANGULO_KOGA:3-8,

author = { JESÚS SÁNCHEZ-DEHESA MORENO-CID and JUAN CARLOS ANGULO IBÁÑEZ and T. KOGA } ,

title = { THE ELECTRON-PAIR DENSITY OF ATOMIC SYSTEMS: RIGOROUS BOUNDS AND APPLICATION TO HELIUM },

journal = { ZEITSCHRIFT FÜR PHYSIK D },

year = { 1992 },

issn = { 0178-7683 },

pages = { 3-8 },

}