Kosower, Edward M. (July 1958). "The Effect of Solvent on Spectra. I. A New Empirical Measure of Solvent Polarity: Z-Values". Journal of the American Chemical Society. 80 (13): 3253–3260. doi:10.1021/ja01546a020. ISSN0002-7863.
Kosower, Edward M. (July 1958). "The Effect of Solvent on Spectra. I. A New Empirical Measure of Solvent Polarity: Z-Values". Journal of the American Chemical Society. 80 (13): 3253–3260. doi:10.1021/ja01546a020. ISSN0002-7863.