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Mencinger M, Panagopoulos I, Contreras JA, Mitelman F, Aman P (Mar 1998). "Expression analysis and chromosomal mapping of a novel human gene, APRIL, encoding an acidic protein rich in leucines". Biochim Biophys Acta. 1395 (2): 176–80. doi:10.1016/S0167-4781(97)00165-6. PMID9473664.