Koch's method  
  Part of: Stoyanova D, Ivanova I, Angelov O, Vladkova T (2017) Antibacterial activity of thin filmsĀ TiO2 doped with Ag and Cu on Gracilicutes and Firmicutes bacteria. BioDiscovery 20: e21596. https://doi.org/10.3897/biodiscovery.20.e21596