Klocke, Peter; von Briel, E.; Spranger, Jörg and Merck, C.C. (2003) "SSP" High Dilutions (D30) for Prophylaxis and Metaphylaxis in Dairy Cattle Mastitis Control. In: Improving the success of Homoeopathy 4, The Royal London Homoeopathic Hospital, pp. 95-96.