Díaz Chapell, P. A., Vázquez Alfonso, Y., Batista Sotolongo, C. and Velasteguí López, P. (2019) “The importance of the first strike to have a good performance and a good effectiveness in the starting pitchers and relays of the youth category”, ConcienciaDigital, 2(4), pp. 78-86. doi: 10.33262/concienciadigital.v2i4.1015.