Ruiz Chatez, Danyerly Johana, and Natalia Afanasjeva. “Enzymatic Quantification Method With DNS for ß-Mannanase in Soybeans and in a Nutritional Additive”. Ciencia Y Agricultura, vol. 19, no. 3, Dec. 2022, doi:10.19053/01228420.v19.n3.2022.14621.