Widia, Y., E. Ervianti, and M. Hutomo. “Metal Patch Testing With Nickel, Chromium, and Cobalt in Atopic Dermatitis Patients”. Berkala Ilmu Kesehatan Kulit Dan Kelamin, vol. 29, no. 3, Nov. 2017, pp. 243-52, doi:10.20473/bikk.V29.3.2017.243-252.