Pure Appl. Chem., 1985, Vol. 57, No. 3, pp. 531-542
doi:10.1351/pac198557030531
COMMISSION ON ELECTROANALYTICAL CHEMISTRY AND COMMISSION ON ELECTROCHEMISTRY
Definition of pH scales, standard reference values, measurement of pH and related terminology (Recommendations 1984)
A. K. Covington, R. G. Bates and R. A. Durst