1. Scheibner G (1970) Monatsh Veterinärmed 25:624
2. Jonsson U, Snygg BG (1974) Chem Mikrobiol Technol Lebensm 3:76
3. Jonsson U, Snygg BG (1974) Chem Mikrobiol Technol Lebensm 3:113
4. Just E, Strauß R (1981) Zucker-Süßwaren-Wirtschaft 34:282
5. Andersson RE, Hedlund CB, Jonsson U (1979) J Dairy Sci 62:361