Gatt, R. & Berman, E. R. (1966) Anal. Biochem. 16,167-171 Hensten-Pettersen, A. & Jacobsen, N. (1975) Arch. Oral. Biol20,111-114 Martin, F., Mathian, R., Berard, A. & Lambert, R. (1969) Digestion 2,103-112 Pryce-Evans, D. A. (1960)J. Lab. Clin. Med. 55,381-385 Schrager, J. & Oates, M. D. G. (1971) Arch. Oral Biol. 16,1269-1279 Sonju, T. & Rolla, G. (1974) Arch. Oral Biol. 19, 879-882 Warren, L....