Schneider MP, van Melle G, Uldry C, Huynh-Ba M, Fallab Stubi CL, Iorillo D, Burnier M, Zellweger JP. Electronic monitoring of long-term use of the nicotine nasal spray and predictors of success in a smoking cessation program. Nicotine Tob Res. 2003 Oct;5(5):719–27. doi: 10.1080/14622200310001608545. PMID: 14577988.