Kurachi K, Davie E. Isolation and characterization of a cDNA coding for human factor IX. Proc Natl Acad Sci USA. 1982, roč. 79, čís. 21, s. 6461–4. DOI10.1073/pnas.79.21.6461. PMID6959130.
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Biggs RA, Douglas AS, MacFarlane RG, Dacie JV, Pittney WR, Merskey C, O'Brien JR. Christmas disease: a condition previously mistaken for haemophilia.Br Med J 1952;2:1378-1382. PMID12997790.
Kurachi K, Davie E. Isolation and characterization of a cDNA coding for human factor IX. Proc Natl Acad Sci USA. 1982, roč. 79, čís. 21, s. 6461–4. DOI10.1073/pnas.79.21.6461. PMID6959130.