Barletta C, Batticane N, Ragusa RM, Leube R, Peschle C, Romano V (1990). "Subchromosomal localization of two human cytokeratin genes (KRT4 and KRT15) by in situ hybridization". Cytogenetics and Cell Genetics. 54 (3–4): 148–150. doi:10.1159/000132979. PMID1702379.
Barletta C, Batticane N, Ragusa RM, Leube R, Peschle C, Romano V (1990). "Subchromosomal localization of two human cytokeratin genes (KRT4 and KRT15) by in situ hybridization". Cytogenetics and Cell Genetics. 54 (3–4): 148–150. doi:10.1159/000132979. PMID1702379.