SA. Taylor, J. Duffin; C. Cameron; J. Teitel; B. Garvey; DP. Lillicrap, Characterization of the original Christmas disease mutation (cysteine 206----serine): from clinical recognition to molecular pathogenesis., in Thromb Haemost, vol. 67, n. 1, gennaio 1992, pp. 63-5, PMID 1615485.