Bökfi, Katalin, et al. “Evaluation of the Blood Product Characteristics of Meat Meal and Hemoglobin With Non-Invasive Methods in the VISNIR Wavelength”. Acta Agraria Debreceniensis, no. 69, Mar. 2016, pp. 49-56, https://doi.org/10.34101/actaagrar/69/1787.