Claudy, AL, et al. “Epidermal Nuclear IgG Deposition in Normal Skin: Characterization by Anti-Ribonucleoprotein IgG-Fab Fragments”. Acta Dermato-Venereologica, vol. 61, no. 2, Mar. 1981, pp. 115-8, doi:10.2340/0001555561115118.