Waldroup, P.; Watkins, S.; Hellwig, H. Influence of Sodium Source and Level on Performance of Second-Cycle Hens Fed Diets With Different Levels of Nonphytate Phosphorus. Int. J. Poult. Sci. 2005, 4 (6), 399–407. https://doi.org/10.3923/ijps.2005.399.407.