Kaljurand, I. ; Kütt, A. ; Sooväli, L. ; Rodima, T. ; Mäemets, V. ; Leito, I. ; Koppel, I.A. Extension of the Self-Consistent Spectrophotometric Basicity Scale in Acetonitrile to Full Span of 28 pKa Units: Unification of Different Basicity Scales. J. Org. Chem.2005, 70, 1019-1028. DOI: 10.1021/jo048252w