Rahnama, M., Czupkałło, Łukasz, Kozicka-Czupkałło, M., & Łobacz, M. (2014). Gingival crevicular fluid – composition and clinical importance in gingivitis and periodontitis. Polish Journal of Public Health, 124(2), 96-98. https://doi.org/10.2478/pjph-2014-0022