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Scientific Opinion on the safety and efficacy of vitamin K3 (menadione sodium bisulphite and menadione nicotinamide bisulphite) as a feed additive for all animal species. EFSA Journal, 2014, 12. vsk, nro 1. doi:10.2903/j.efsa.2014.3532Artikkelin verkkoversio.[vanhentunut linkki]
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EKR Stokstad, HJ Almquist: Hemorrhagic chick disease of dietary origin. Journal of Biological Chemistry, 1935, 111. vsk, nro 1, s. 105–113. ISSN 0021-9258Artikkelin verkkoversio.
EA Doisy et al: The constitution of vitamin K2. Journal of Biological Chemistry, 1940, 130. vsk, nro 3, s. 721–729. ISSN 0021-9258Artikkelin verkkoversio.