Recommendation of the Nomenclature Committee of the International Union of Biochemistry. The heading gives 1981 as the recommendation year; no first-publication date or online revision date is established. The IUBMB nomenclature site at Queen Mary University of London hosts the text; no individual author byline is credited.
Online text: iubmb.qmul.ac.uk/kinetics/ek4t6.html
Introduction: iubmb.qmul.ac.uk/kinetics/ek1t3.html
Cited passages: §1, commissioning and operational terminology; §§6.1–6.2, reversibility and concentration factors; §6.4, classifications and operational constants versus dissociation constants.