Roe, F.L., E.J. Wentland, N. Zelver, B.K. Warwood, R. Waters, and W.G. Characklis, "On-line side-stream monitoring of biofouling," In: Geesey, G.G., Z. Lewandowski, H.-C. Flemming, (eds), Biofouling and Biocorrosion in Industrial Water Systems, Lewis Publishers, 1993, Chapter 8, pp. 137-150.