Paternina-Martínez, Yuranis-Stella, and Hailin-Patricia Pretel-Contreras. “Presence of Somatic Symptoms in Girls and Boys: A Comparison Between the Period Without Examinations and With Examinations”. Búsqueda, vol. 5, no. 21, Dec. 2018, pp. 231-239, https://doi.org/10.21892/01239813.424.