1. Bruttini, R., Rovero, G. and Baldi, G. (1991) Experimentation and modelling of pharmaceutical lyophilisation using a pilot plant. Chem. Eng. J. Biochem. Eng. J., 45(3), B67-B77.
2. Cohen, J.S. and Yang, T.C.S. (1995) Progress in food dehydration. Trends Food Sci. Tech., 6(1), 20–5.
3. Coumans, W.J., Kirkhof, PJ.A.M. and Bruins, S. (1994) Theoretical and practical aspects of aroma retention in spray drying and freeze drying. Drying Tech., 12(1–2), 99–147.
4. Franks, F., Hatley, R.H.M. and Mathias, S.F. (1991) Materials science and the production of shelf- stable biologicals. BioPharm., 3(5), 38–55.
5. Greaves, R.I.N. (1966) Improved Freezing Method, British Patent No. 1,026,877.