Videa Bustillo, M., and M. V. Videa Zelaya. “Natural Yogur Obtained from Milk With Dairy Serum a Laboratory Scale, National University of Engineering, North Regional Headquarters, Estelí Nicaragua”. Journal of Science and Technology El Higo, vol. 9, no. 1, Dec. 2019, pp. 59-68, doi:10.5377/elhigo.v9i1.8997.