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3. B. D. Janković, K. Isaković, and D. Vujić, in: L. Fiore-Donati and M. G. Hanna, Jr., Eds., Lymphoid Tissue and Germinal Centers in Immune Response, Adv. Exp. Med. Biol., p. 269, New York: Plenum Press, 1969.
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5. B. D. Janković and K. Isaković, Experientia, 24:1272, 1968.