The ultrastructural localization of factor VIII-antigen in human platelets, megakaryocytes and endothelial cells utilizing a ferritin-labelled antibody - Piovella, F; Nalli, G; Malamani, G D; Majolino, I; Frassoni, G; Sitar, G M; Ruggeri, A; Dell’orbo, C; Ascari, E (British Journal of Haematology, 1978)