Schneider, MacKay, Steiner et al.: "BAFF, a novel ligand of the tumor necrosis factor family, stimulates B cell growth." in: The Journal of experimental medicine, Vol. 189, Issue 11, pp. 1747-56, 1999 (PubMed).
Moore, Belvedere, Orr et al.: "BLyS: member of the tumor necrosis factor family and B lymphocyte stimulator." in: Science (New York, N.Y.), Vol. 285, Issue 5425, pp. 260-3, 1999 (PubMed).