JANKOWSKA, Joanna, SZYMELFEJNIK, Ewa and NOWAK, Dariusz. The Source of Phosphorus in Diet of 17 Year Old Youth. Medical and Biological Sciences. Online. 24 June 2012. Vol. 26, no. 3, pp. 75-79. [Accessed 5 February 2025]. DOI 10.12775/v10251-012-0058-y.