Jamie Doward, Revealed: no need to add cancer-risk nitrites to ham, in The Observer, London, 23 marzo 2019. URL consultato il 14 febbraio 2021 (archiviato dall'url originale il 26 gennaio 2021).
«The results show that there is no change in levels of inoculated C botulinum over the curing process, which implies that the action of nitrite during curing is not toxic to C botulinum spores at levels of 150ppm [parts per million] ingoing nitrite and below.»
