Holliday, R., Preshaw, P. M., Ryan, V., Sniehotta, F. F., McDonald, S., Bauld, L., & McColl, E. (2019). A feasibility study with embedded pilot randomised controlled trial and process evaluation of electronic cigarettes for smoking cessation in patients with periodontitis. Pilot Feasibility Stud.

Holliday, Richard, Philip M. Preshaw, Vicky Ryan, Falko F. Sniehotta, Suzanne McDonald, Linda Bauld, und Elaine McColl. "A Feasibility Study With Embedded Pilot Randomised Controlled Trial and Process Evaluation of Electronic Cigarettes for Smoking Cessation in Patients With Periodontitis." Pilot Feasibility Stud 2019.

Holliday, Richard, et al. "A Feasibility Study With Embedded Pilot Randomised Controlled Trial and Process Evaluation of Electronic Cigarettes for Smoking Cessation in Patients With Periodontitis." Pilot Feasibility Stud 2019.