Ibarra, J. L., Agas, J. M., Lee, M., Pan, J. L., & Buttenheim, A. M. (2018). Comparison of Online Survey Recruitment Platforms for Hard-to-Reach Pregnant Smoking Populations: Feasibility Study. JMIR Res Protoc.

Ibarra, Jose Luis, Jessica Marie Agas, Melissa Lee, Julia Lily Pan, και Alison Meredith Buttenheim. "Comparison of Online Survey Recruitment Platforms for Hard-to-Reach Pregnant Smoking Populations: Feasibility Study." JMIR Res Protoc 2018.

Ibarra, Jose Luis, et al. "Comparison of Online Survey Recruitment Platforms for Hard-to-Reach Pregnant Smoking Populations: Feasibility Study." JMIR Res Protoc 2018.