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Tilkorn, Daniel-Johannes, Marcus Lehnhardt, Jörg Hauser, Adrien Daigler, Heinz Homann, Hans Steinau, و Cornelius Kuhnen. Merkel Cell Carcinoma Metastasis and Dermatofibrosarcoma Protuberans Presenting As a Collision Tumour: A Case Report and Review of the Literature. BioMed Central, 2009.

Tilkorn, Daniel-Johannes, et al. Merkel Cell Carcinoma Metastasis and Dermatofibrosarcoma Protuberans Presenting As a Collision Tumour: A Case Report and Review of the Literature. BioMed Central, 2009.