Zhu, YI; Stiller, MJ; et al. (2001). "Dapsone and sulfones in dermatology: overview and update". Journal of the American Academy of Dermatology. 45 (3): 420–34. doi:10.1067/mjd.2001.114733. PMID11511841. {{cite journal}}: Explicit use of et al. in: |last1= (help)
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"Dapsone". The American Society of Health-System Pharmacists. Retrieved Jan 12, 2015.
Zhu, YI; Stiller, MJ; et al. (2001). "Dapsone and sulfones in dermatology: overview and update". Journal of the American Academy of Dermatology. 45 (3): 420–34. doi:10.1067/mjd.2001.114733. PMID11511841. {{cite journal}}: Explicit use of et al. in: |last1= (help)