S. Zara, M. Di Giulio, S. D’Ercole, L. Cellini, M. Rapino, and A. Cataldi, “Effects of HEMA on human gingival fibroblasts/clinical Streptococcus mitis strains co-cultured in vitro”, Ital J Anat Embryol, vol. 115, no. 1/2, p. 180, Nov. 2010.