SEARCH Articles Figures Tables Adsorption theory London forces Debye-London theory Dispersion forces, London theory Heitler-London Valence Bond theory Heitler-London molecular orbital theory Heitler-London theory London London dispersion theory London energy theory London gauge theory London long-range theory Perturbation theory London Perturbation theory. A comparison with results obtained in the Heitler-London approximation Valence bond theory Heitler-London formulation