Nguyen Thi Ngoc De, Chau Minh Tan, and Nguyen Bao Loc, “EFFECTS OF PURPLE SWEET POTATO RATIOS ON ANTIOXIDANT AND SENSORIAL QUALITY OF JELLY YOGURT”, HUIT_OJS, vol. 26, no. 1E, p. 286, May 2026, doi: 10.62985/j.huit_ojs.vol26.no1E.364.