Kramer, S. C., Schmidt, A. J., Berg, R. C., Furegato, M., Hospers, H., Folch, C., & Marcus, U. (2016). Factors associated with unprotected anal sex with multiple non-steady partners in the past 12 months: Results from the European Men-Who-Have-Sex-With-Men Internet Survey (EMIS 2010). BMC Public Health.

Kramer, Sarah C., Axel Jeremias Schmidt, Rigmor C. Berg, Martina Furegato, Harm Hospers, Cinta Folch, and Ulrich Marcus. "Factors Associated With Unprotected Anal Sex With Multiple Non-steady Partners in the Past 12 months: Results From the European Men-Who-Have-Sex-With-Men Internet Survey (EMIS 2010)." BMC Public Health 2016.

Kramer, Sarah C., et al. "Factors Associated With Unprotected Anal Sex With Multiple Non-steady Partners in the Past 12 months: Results From the European Men-Who-Have-Sex-With-Men Internet Survey (EMIS 2010)." BMC Public Health 2016.