Bonsmann, G.S.S., Walczyk, T., Renggli, S. and Hurrell, R.F. (2008) Oxalic Acid Does Not Influence Nonhaem Iron Absorption in Humans: A Comparison of Kale and Spinach Meals. European Journal of Clinical Nutrition, 62, 336-341.
https://doi.org/10.1038/sj.ejcn.1602721

has been cited by the following article: