Two different DOIs for the same work, from different publishers: Intravenous Administration of Human γ-Globulin S. Barandun, P. Kistler, F. Jeunet, H. Isliker 1962, Vox Sanguinis https://fatcat.wiki/release/search?q=%22Intravenous+administration+of+human+%CE%B3-globulin%22&generic=1 10.1111/j.1423-0410.1962.tb03240.x 10.1159/000464763