Rovčanin, B. R., Tatjana, D. Steševi, D. Keki, and M. Risti. “Antibacterial Effect of Herniaria Hirsuta, Prunus Avium, Rubia Tinctorum and Sempervivum Tectorum Plant Extracts on Multiple Antibiotic Resistant Escherichia Coli”. Bioscience Journal, vol. 31, no. 6, Nov. 2015, pp. 1852-61, doi:10.14393/BJ-v31n6a2015-29091.