Ramírez-Santos A, Suárez-Amor O, Pérez-Pérez L, Loureiro M, Peteiro C, Toribio J. [Localized cutaneous amyloidosis secondary to porokeratosis: a retrospective histopathologic study of 30 patients]. Actas Dermosifiliogr. 2008 Oct;99(8):639–43. PMID: 19080895.