O. Kaygili, S. Keser, M. Kom, N. Bulut, and S. V. Dorozhkin, “The effect of simulating body fluid on the structural properties of hydroxyapatite synthesized in the presence of citric acid”, Prog. Biomater., vol. 5, no. 3-4, Oct. 2016, doi: 10.1007/s40204-016-0055-5.