1. Eitenmiller RR, Ye L, Landen WO Jr (2008) Vitamin analysis for the health and food sciences, 2nd edn., p. 135. Taylor & Francis Group, CRC, Boca Raton, FL
2. AOAC International (2016) Official methods of analysis, 20th edn., AOAC International, Gaithersburg, MD
3. British Standards Institution AW/275 (2014) Foodstuffs. Determination of vitamin A by high performance liquid chromatography.Part 1: Measurement of all-E-retinol and 13-Z-retinol, BS EN 12823–1:2014
4. British Standards Institution AW/275 (2000) Foodstuffs. Determination of vitamin A by high performance liquid chromatography. Part 2: Measurement of β-carotene, BS EN 12823–2:2000
5. British Standards Institution AW/275 (2009) Foodstuffs. Determination of vitamin D by high performance liquid chromatography. Measurement of cholecalciferol (D3) and ergocalciferol (D2), BS EN 12821:2009