Collect. Czech. Chem. Commun. 1988, 53, 1919-1942

Coupled-pair theories and Davidson-type corrections for quasidegenerate states: The H4 model revisited

Josef Paldusa,b,c,d, Paul E. S. Wormera,c and Marc Benardd

a Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
b Institute for Advanced Study Berlin, D-1000 Berlin 33, F.R.G.
c Institute for Theoretical Chemistry, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands
d Laboratoire de Chimie Quantique, E.R. 139 du C.N.R.S., Institut Le Bel, F-67000 Strasbourg, France

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