C. Mehta, A. Patel, D. Singh, and B. Patel, “Prevalence of diphtheria in a tertiary care hospital of Western part of India – A clinicoepidemiological study”, Indian J Child Health, vol. 6, no. 11, pp. 581–583, Nov. 2019, doi: 10.32677/IJCH.2019.v06.i11.001.