1. Acetaldehyde production by combined yogurt cultures;Hamdan;J. Dairy Sci.,1971
2. Study on the thermophilic lactobacilli in milk for yoghurt production;Jankov,1966
3. Yoghurt fermented by Lactobacillus delbrueckii subsp. bulgaricus H+-ATPase-defective mutants exhibits enhanced viability of Bifidobacterium breve during storage;Ongol;Int. J. Food Microbiol.,2007
4. The Lactic Acid Bacteria;Orla-Jensen,1919
5. Dairy Bacteriology;Orla-Jensen,1921