Gülmezoğlu, Ekrem, and James W. Sayre. “The Use of Fluorescent Labelled Diphtheria Antitoxin for the Diagnosis of Diphtheria Cases”. The Turkish Journal of Pediatrics, vol. 6, no. 2, Apr. 1964, pp. 1-7, https://doi.org/10.24953/turkjpediatr.1964.4457.