Henri A.H.A.FavreHenri A.H.A., Warren H.W.H.PowellWarren H.W.H., Nomenclature of Organic Chemistry. IUPAC Recommendations and Preferred Names 2013, wyd. 1, Royal Society of Chemistry, International Union of Pure and Applied Chemistry, 2014, s. 134, DOI: 10.1039/9781849733069, ISBN 978-0-85404-182-4(ang.).
JörgJ.FabriJörgJ., UlrichU.GraeserUlrichU., Thomas A.T.A.SimoThomas A.T.A., Toluene, [w:] Ullmann’s Encyclopedia of Industrial Chemistry, Weinheim: Wiley‐VCH, 2005, s. 3, DOI: 10.1002/14356007.a27_147, ISBN 978-3-527-30673-2(ang.).