R. López

High-performance liquid chromatographic determination of the pi values of azol-N-yl substituents.

J. Alvarez-Builla, C. Toiron, G. I. Yranzo, 1992, Journal of pharmaceutical sciences.

Hydrophobicity of Heterocycles: Determination of the π Values of Substituents on N‐Phenylpyrazoles

M. Pastor, F. Gago, J. Elguero, 1994 .