Pure Appl. Chem., 1991, Vol. 63, No. 2, pp. 195-204
http://dx.doi.org/10.1351/pac199163020195
The lego way: curve crossing diagrams as general models in physical organic chemistry
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Pure Appl. Chem., 1991, Vol. 63, No. 2, pp. 195-204
http://dx.doi.org/10.1351/pac199163020195