Pure Appl. Chem., 1962, Vol. 4, No. 1, pp. 15-22
http://dx.doi.org/10.1351/pac196204010015
New concepts in the theory of π-electron spectra
First page:
Pure Appl. Chem., 1962, Vol. 4, No. 1, pp. 15-22
http://dx.doi.org/10.1351/pac196204010015