Diaz, LA, NJ Calvanico, TB Tomasi Jr, and RE. Jordon. “PBS-Soluble Substances With Blood Group Activity from Human Epidermis and Dermis”. Acta Dermato-Venereologica 57, no. 6 (November 1, 1977): 493–496. Accessed June 19, 2026. https://medicaljournalssweden.se/actadv/article/view/17404.