Notley, Caitlin, Brown, Tracey J., Bauld, Linda, Hardeman, Wendy, Holland, Richard, Naughton, Felix, Orton, Sophie, Ussher, Michael, "Development of a Complex Intervention for the Maintenance of Postpartum Smoking Abstinence: Process for Defining Evidence-Based Intervention", International Journal of Environmental Research and Public Health, 2019