Stanojevic, D., L. Comic, O. Stefanovic, and S. Solujic Sukdolak. “In Vitro Synergistic Antibacterial Activity of Melissa Officinalis L. And Some Preservatives”. Spanish Journal of Agricultural Research, Vol. 8, no. 1, Mar. 2010, pp. 109-15, doi:10.5424/sjar/2010081-1149.