E. Liechti, M. and Kupferschmidt, H. (2004) “Gamma-hydroxybutyrate (GHB) and Gamma-butyrolactone (GBL): Analysis of overdose cases reported to the Swiss Toxicological Information Centre”, Swiss Medical Weekly, 134(3536), pp. 534–537. doi: 10.4414/smw.2004.10697.