J. X. Vega Fajardo, S. Y. Barbosa Arrieta, L. L. Barrios Murillo, C. D. Ojito Camacho, and S. P. Padilla Noriega, “Motor skills and language development of three years old child diagnosed with Williams Syndrome”, penamer, vol. 11, no. 20, Jan. 2018, doi: 10.21803/pensam.v11i20.20.