| Anaerobic digestion I. The microbiology of anaerobic digestion DF Toerien, WHJ Hattingh Water Research 3 (6), 385-416, 1969 | 270 | 1969 |
| The effect of carbon on algal growth—its relationship to eutrophication JC Goldman, DB Porcella, EJ Middlebrooks, DF Toerien Water research 6 (6), 637-679, 1972 | 175 | 1972 |
| Enhanced biological phosphorus removal in activated sludge systems DF Toerien, A Gerber, LH Lötter, TE Cloete Advances in microbial ecology, 173-230, 1990 | 167 | 1990 |
| Limnological aspects of small sewage ponds TJ Wrigley, DF Toerien Water Research 24 (1), 83-90, 1990 | 74 | 1990 |
| The bacterial nature of the acid-forming phase of anaerobic digestion DF Toerien, ML Siebert, WHJ Hattingh Water research 1 (7), 497-507, 1967 | 61 | 1967 |
| Microcystis toxins: isolation, identification, implications DF Toerien, WE Scott, MJ Pitout Water Sa 2 (4), 1976 | 60 | 1976 |
| A biological and chemical study of several anaerobic digesters JP Kotzé, PG Thiel, DF Toerien, WHJ Hattingh, ML Siebert Water Research 2 (3), 195-213, 1968 | 60 | 1968 |
| Biological changes during the adaptation of an anaerobic digester to a synthetic substrate WHJ Hattingh, JP Kotze, PG Thiel, DF Toerien, ML Siebert Water Research 1 (4), 255-277, 1967 | 55 | 1967 |
| The proteolytic bacteria present in the anaerobic digestion of raw sewage sludge ML Siebert, DF Toerien Water Research 3 (4), 241-250, 1969 | 51 | 1969 |
| The role of perceived value in promoting customer satisfaction: Antecedents and consequences P Mbango Cogent Social Sciences 5 (1), 1684229, 2019 | 45 | 2019 |
| The limnology of some South African impoundments I. The physico-chemical limnology of Hartbeespoort Dam WE Scott, MT Seaman, AD Connell, SI Kohlmeyer, DF Toerien Journal of the Limnological Society of southern Africa 3 (2), 43-58, 1977 | 45 | 1977 |
| Effect of temperature on heterotrophic glucose uptake, mineralization, and turnover rates in lake sediments DF Toerien, B Cavari Applied and environmental microbiology 43 (1), 1-5, 1982 | 43 | 1982 |
| A method for the enumeration and cultivation of anaerobic “acid-forming” bacteria present in digesting sludge DF Toerien, ML Siebert Water Research 1 (6), 397-404, 1967 | 41 | 1967 |
| A review of eutrophication and guidelines for its control in South Africa D Toerien Council for Scientific and Industrial Research, 1977 | 40 | 1977 |
| Enrichment culture studies on aerobic and facultative anaerobic bacteria found in anaerobic digesters DF Toerien Water Research 1 (2), 147-155, 1967 | 40 | 1967 |
| Enumeration, isolation and identification of sulphate-reducing bacteria of anaerobic digestion DF Toerien, PG Thiel, MM Hattingh Water Research 2 (7), 505-513, 1968 | 38 | 1968 |
| Fish production in small oxidation ponds TJ Wrigley, DF Toerien, IG Gaigher Water Research 22 (10), 1279-1285, 1988 | 36 | 1988 |
| Interrelations between biological and chemical characteristics in anaerobic digestion PG Thiel, DF Toerien, WHJ Hattingh, JP Kotzé, ML Siebert Water Research 2 (6), 391-408, 1968 | 34 | 1968 |
| Provisional algal assay procedures DB Porcella, P Grau, CH Huang, J Radimsky, DF Toerien, EA Pearson First Annual Report. SERLNo, 70-8, 1970 | 32 | 1970 |
| Growth models for Salvinia molesta DF Toerien, PR Cary, CM Finlayson, DS Mitchell, PGJ Weerts Aquatic Botany 16 (2), 173-179, 1983 | 31 | 1983 |
