Publications for Phylloquinone being present in Lettuce

1. Booth SL: Vitamin K: food composition and dietary intakes. Food Nutr Res. 2012;56. pii: 5505. doi: 10.3402/fnr.v56i0.5505. Epub 2012 Apr 2. [PubMed:22489217 ]
2. Damon Molly, Zhang Nancy Z., Haytowitz David B., Booth Sarah L.: Phylloquinone (vitamin K1) content of vegetables Journal of Food Composition and Analysis. 2005/12/01;18:751-758.