Cummings, J.H., Gibson, G. ORCID: https://orcid.org/0000-0002-0566-0476 and Macfarlane, G.T. (1989) Quantitative estimates of fermentation in the hind gut of man. Acta Veterinaria Scandanavica (86). pp. 76-82.

Gibson, G. ORCID: https://orcid.org/0000-0002-0566-0476, Parkes, R.J. and Herbert, R.A. (1989) Biological availability and turnover rate of acetate in marine and estuarine sediments and the relationship to dissimilatory sulphate reduction. FEMS Microbiology Ecology (62). pp. 303-306.

Macfarlane, G.T., Cummings, J.H., Macfarlane, S. and Gibson, G. ORCID: https://orcid.org/0000-0002-0566-0476 (1989) Influence of retention time on degradation of pancreatic enzymes by human colonic bacteria grown in a 3-stage continuous culture system. Journal of Applied Bacteriology (67). pp. 521-527.

Macfarlane, G.T., Hay, S. and Gibson, G. ORCID: https://orcid.org/0000-0002-0566-0476 (1989) Influence of mucin on glycosidase, protease and arylamidase activities of human gut bacteria grown in a 3-stage continuous culture system. Journal of Applied Bacteriology (66). pp. 407-417.

Parkes, R.J., Gibson, G. ORCID: https://orcid.org/0000-0002-0566-0476, Mueller-Harvey, I., Buckingham, W.J. and Herbert, R.A. (1989) Determination of the substrates for sulphate-reducing bacteria within marine and estuarine sediments with different rates of sulphate reduction. Journal of General Microbiology (135). 175 -187.