@Article{Tan2019,
journal="Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii",
issn="1642-395X",
volume="36",
number="2",
year="2019",
title="Dermoscopy of frictional asymptomatic darkening 
of the extensor surfaces",
author="Tan, Cheng
and Xia, Lulu",
pages="232--233",
doi="10.5114/ada.2019.84598",
url="http://dx.doi.org/10.5114/ada.2019.84598"
}