Chemical Characteristics and Viability of Starter Cultures of Freeze–Dried Sweet Potato Extract–Supplemented Synbiotic YogurtAgustina Intan Niken Tari, Catur Budi Handayani, Sri Hartati, Damat Damat and Karina StankevičaE3S Web Conf., 226 (2021) 00006DOI: https://doi.org/10.1051/e3sconf/202122600006