Menal-Puey, S. and Asensio, E. 2015. Validation of a rapid method for detecting nitrate in chard (Beta vulgaris cycla). Analysis of Spanish commercial samples marketed in the Region of Huesca, Spain, and estimation of the daily intake. Spanish Journal of Human Nutrition and Dietetics. 19, 1 (Jan. 2015), 4–11. DOI:https://doi.org/10.14306/renhyd.19.1.110.