Muhardina, V. et al. 2019. Extrusion encapsulation of Lactobacillus bulgaricus coated by carrageenan – alginate with additional tofu waste flour prebiotic. International Journal of Engineering & Technology. 7, 4 (Mar. 2019), 5242–5244. DOI:https://doi.org/10.14419/ijet.v7i4.24255.