Addy, M; Richards, J; Williams, G (August 1980). “Effects of a zinc citrate mouthwash on dental plaque and salivary bacteria”. 《J. Clin. Periodontol.》 7 (4): 309–15. doi:10.1111/j.1600-051x.1980.tb01973.x. PMID7007451.
Addy, M; Richards, J; Williams, G (August 1980). “Effects of a zinc citrate mouthwash on dental plaque and salivary bacteria”. 《J. Clin. Periodontol.》 7 (4): 309–15. doi:10.1111/j.1600-051x.1980.tb01973.x. PMID7007451.