J. González Quesada DDS, MSc and S. Rivera Alvarez DDS, “Effect of Nonsurgical Periodontal Treatment on Levels of Pyridinoline (ICTP) in the Gingival Crevicular Fluid (GCF)”, Odovtos - Int J Dent Sc, vol. 19, no. 1, pp. 77–85, Mar. 2017.