Zhang, R.Z., and W.Y. Zhu. “Hair Casts Combined With Traction Alopecia. Case Report”. European Journal of Pediatric Dermatology, vol. 13, no. 1, Mar. 2003, pp. 21-4, https://ejpd.migration.pkpps03.publicknowledgeproject.org/index.php/journal/article/view/258.