Saxena, S., Ismael, Z., Murray, M., Barker, C., Wong, I., Sharland, M., & Long, P. (2014). Oral penicillin prescribing for children in the UK: a comparison with BNF for Children age-band recommendations. The British Journal of General Practice : The Journal of the Royal College of General Practitioners, 64(621), e217-22. https://doi.org/10.3399/bjgp14X677842

Kothari, R., Barker, C., Pistrang, N., Rozental, A., Egan, S., Wade, T., … Shafran, R. (2019). A randomised controlled trial of guided internet-based cognitive behavioural therapy for perfectionism: Effects on psychopathology and transdiagnostic processes. Journal of Behavior Therapy and Experimental Psychiatry, 64, 113-122. https://doi.org/10.1016/j.jbtep.2019.03.007

Barker, C. (1969). Warrior Genes. Modern Fiction Studies, 66(4), 755-779. https://doi.org/10.1353/mfs.2020.0050 (Original work published 1969)