Bohak, Ingrid, Karin Thelen, and Claudia Beimfohr. 2006. “Description of Lactobacillus Backi Sp. Nov., an Obligate Beer-Spoiling Bacterium”. BrewingScience 59 (3/4): 78-82. https://brewingscience.de/index.php/brewingscience/article/view/521.