LFRA ingredients handbook, 1999: t.p. (Robert Rastall)
Prebiotics, c2006: t.p. (R.A. Rastall) p. vii (Robert A. Rastall; Prof. of Biotechnology, Sch. of Food Biosciences, Univ. of Reading, Reading, UK)
Univ. of Reading, Sch. of Food Biosciences WWW staff page, viewed Sept. 26, 2006 (Prof. Bob Rastall; Prof. of Biotechnology; author of Leatherhead Food RA ingredients handbook: enzymes, 1999)