Media type: E-Article Title: Application of an extremum principle to the determination of the diamagnetic susceptibility and form factor of helium Contributor: Shakeshaft, Robin; Rosenberg, Leonard; Spruch, Larry imprint: American Physical Society (APS), 1976 Published in: Physical Review A Language: English DOI: 10.1103/physreva.14.1989 ISSN: 0556-2791 Origination: Footnote: