Potential energy surface hyperspherical mapping

V. Aquilanti and S. Cavalli, Hyperspherical coordinates for molecular dynamics by the methods of trees and the mapping of potential energy surfaces for triatomic systems. J. Chem. Phys. 85, 1362-1375 (1986). 

Hyperspherical mapping of potential energy surfaces and alternative paiametriza-tions of hyperangles. 

V. Aquilanti, G. Grossi, and A. Lagani, On hyperspherical mapping and harmonic expansions for potential energy surfaces. J. Chem. Phys., 76 1587-1588, 1982. 

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