Csikós, M, et al. “Novel N160I Mutation of Keratin 9 in a Large Pedigree from Hungary With Epidermolytic Palmoplantar Keratoderma”. Acta Dermato-Venereologica, vol. 83, no. 4, Aug. 2003, pp. 303-5, doi:10.1080/00015550310016652.