- Henry G. Watson et al: A comparison of the efficacy and rate of response to oral and intravenous Vitamin K in reversal of over-anticoagulation with warfarin. British Journal of Haematology, 2001, 115, 145-149
- J Nathan Hagstrom, Robert J Arceci: Hypoprothrombinemia. Medscape Reference. Feb 29, 2012
- James L Zehnder: Clinical use of coagulation tests. UpToDate 2014.
- Jerry B. Lefkowitz: Coagulation Pathway and Physiology. ebook