Hohenleutner, Ulrich (1990). «Traditional Tattooing of the Gingiva: Successful Treatment with the Argon Laser». Archives of Dermatology. 126 (4): 547–8. PMID2322008. doi:10.1001/archderm.1990.01670280133037
Hohenleutner, Ulrich (1990). «Traditional Tattooing of the Gingiva: Successful Treatment with the Argon Laser». Archives of Dermatology. 126 (4): 547–8. PMID2322008. doi:10.1001/archderm.1990.01670280133037