Henry E. Armstrong, Contributions to an international system of nomenclature. The nomenclature of cycloids, in Proc. Chem. Soc., vol. 8, n. 114, 8 luglio 1892, p. 128, DOI:10.1039/PL8920800127.
«As ol is indicative of an OH derivative, there seems no reason why the simple word acid should not connote carboxyl, and why al should not connote COH; the names ethanol ethanal and ethanoic acid or simply ethane acid would then stand for the OH, COH and COOH derivatives of ethane.»