Jha, Abhijeet K., MD Zeeshan, Binod K. Sinha, Anupama Singh, and Pallavi Agrawal. 2018. “Periumbilical Perforating Pseudoxanthoma Elasticum: A Rare Case Report”. Dermatology Practical & Conceptual 8 (1). https://dpcj.org/index.php/dpc/article/view/dermatol-pract-concept-articleid-dp0802a02.