1. A self-consistent and cross-checked scale of spin-delocalization substituent constants, the .sigma.JJ.bul. scale
2. (a) Physical Organic Chemistry, 2nd ed., Chapt.11. McGraw-Hill, New York. (1970)
3. (b) Correlation Analysis of Organic Reactivity, Wiley, Chichester (1982)
4. (c) Correlation Analysis of Chemical Data, p.61, Plenum Press, New York (1988)