1. Michelson J. “The Theory and Practice of Industrial Pharmacy”, 2nd ed., L. Lachman, H. A. Lieberman, J. L. Kanig. Lea & Febiger, Philadelphia 1976; 626
2. MPF 50D. Baker Perkins BCS Limited, PeterboroughEngland
3. Tastoterm D. Impac Electronic, Frankfurt/ Main, West Germany