QUACH, T.; TONG, T.; NGUYEN, D.; NGUYEN, H. Survey of some probiotic activity of traditional passionfruit-Kefir and Lactobacillus casei VTCC186 – supplemented passion fruit – Kefir. Science and Technology Development Journal, v. 16, n. 3, p. 40-47, 30 set. 2013.