Articles | Research and Innovation | University of Exeter
https://www.exeter.ac.uk/research/news/articles/safethresholdsforantibiot.html
Evolution of antibiotic resistance at low antibiotic concentrations including selection below the minimal selective concentration | Communications Biology
https://www.nature.com/articles/s42003-020-01176-w
Safe thresholds for antibiotics in sewage needed to help combat antibiotic resistance
https://phys.org/news/2020-09-safe-thresholds-antibiotics-sewage-combat.html