D.M. Grant, E.G. Paul, J. Am. Chem. Soc.,86,2984(1964)

L.P. Lindeman, J.Q. Adams,Anal. Chem.43,1245(1971)

D.E. Derman, M. Jautelat, and J.D. Roberts, J. Org. Chem.,36,2757(1971)

J.B. Stothers, Carbon-13 Nuclear Magnetic Resonance Spectroscopy, Academic Press, New York,1972

G.C.Levy, G.L.Nelson,Carbon-13 Nuclear Magnetic Resonance for Organic Chemists, Wiley-Interscience, New York,1972

J.T. Clerc, E. Pretsch, S. Sternhell, ¹³C-Kernresonanzspektropskopie, Akademische Verlagsgesellschaft, Frankfurt/M, 1973

L.B. Kier,L.H. Hall, Molecular Connectivity in Structure-Activity Analysis, Research Studies Press, John Wiley and Sons, Letchworth, England, (1986)

L.B. Kier, L.H. Hall,Molecular Connectivity in Chemistry and Drug Research,Academic Press, New York,1976