1 Takiguchi RH, "Verrucous porokeratosis of the gluteal cleft(porokeratosis ptychotropica) : a rare disorder easily misdiagnosed" 37 : 802-807, 2010
2 Tallon B, "Porokeratosis ptychotropica a lesser known variant" 34 : 895-, 2009
3 조영민, "Porokeratosis Ptychotropica—a Rare Variant of Porokeratosis: A Case Report" 대한피부과학회 56 (56): 653-655, 2018
4 Hivnor C, "Gene expression profiling of porokeratosis demonstrates similarities with psoriasis" 31 : 657-664, 2004
5 Lucker GP, "An unusual case of porokeratosis involving the natal cleft : porokeratosis ptychotropica" 132 : 150-151, 1995