Del Piano M. et al. In Vitro Sensitivity of Probiotics to Human Pancreatic Juice. J Clin Gastroenterol. 2008; 42 (3): S170-173.
Charteris WP. et al. Development and application of an in vitro methodology to determine the transit tolerance of potentially probiotic Lactobacillus and Bifidobacterium species in the upper human gastrointestinal tract. J App Microbiol. 1998; 84 (5): 759-768.
Del Piano M. et al. Evaluation of the intestinal colonization by microencapsulated probiotic bacteria in comparison with the same uncoated strains. J Clin Gastroenterol. 2010 Sep; 44 Suppl 1:S42-6.