| Water, mining, and waste: an historical and economic perspective on conflict management in South Africa RA Adler, M Claassen, L Godfrey, AR Turton The economics of peace and security journal 2 (2), 2007 | 199 | 2007 |
| Towards a model for ecosystem governance: an integrated water resource management example AR Turton, J Hattingh, M Claassen, DJ Roux, PJ Ashton Governance as a trialogue: Government-society-science in transition, 1-28, 2007 | 126 | 2007 |
| Governance as a trialogue: Government-Society-Science in transition AR Turton, JH Hattingh, GA Maree, DJ Roux, M Claassen, WF Strydom Springer Science & Business Media, 2007 | 122 | 2007 |
| Integrated water resource management in South Africa M Claassen International Journal of Water Governance 1 (3-4), 323-338, 2013 | 65 | 2013 |
| An overview of the pesticide and metal levels present in populations of the larger indigenous fish species of selected South African rivers RGM Heath, M Claassen Water Research Commission, 1999 | 64 | 1999 |
| The TWO analysis–introducing a methodology for the transboundary waters opportunity analysis GEF GEF | 43 | 2008 |
| Managing forests for both downstream and downwind water IF Creed, JA Jones, E Archer, M Claassen, D Ellison, SG McNulty, ... Frontiers in Forests and Global Change 2, 64, 2019 | 39 | 2019 |
| Interpretation and evaluation of the US Environmental Protection Agency ecological risk assessment guidelines K Murray, M Claassen Water Research Commission, 1999 | 20 | 1999 |
| Ecological risk assessment guidelines M Claassen, WF Strydom, K Murray, S Jooste Water Research Commission, 2001 | 19 | 2001 |
| Ecological risk assessment as a framework for environmental impact assessments M Claassen Water science and technology 39 (10-11), 151-154, 1999 | 18 | 1999 |
| How much water do we have M Claassen A CSIR perspective on water–2010, 2010 | 15 | 2010 |
| Governance options for addressing changing forest-water relations D Ellison, M Claassen, M Van Noordwijk, CA Sullivan, B Vira, J Xu, ... International Union of Forest Research Organizations (IUFRO), 2018 | 14 | 2018 |
| Securing water quality for life J Hattingh, M Claassen International journal of water resources development 24 (3), 401-415, 2008 | 14 | 2008 |
| A research, innovation and knowledge management road map for the South African maritime sector: Charting a course to maritime excellence by 2030 N Funke, M Claassen, K Nortje, R Meissner CSIR Report No CSIR/NRE. WR. ER. 2016/0044/A, 2016 | 10 | 2016 |
| Scenarios for the South African water sector in 2025 M Claassen Water SA 39 (1), 143-150, 2013 | 10 | 2013 |
| A path towards realising tangible benefits in transboundary river basins J Granit, M Claassen Getting Transboundary Water Right: Theory and Practice for Effective …, 2009 | 10 | 2009 |
| Ecological Risk Assessment. WRC Report No. TT 151/01 M Claassen, WF Strydom, K Murray, S Jooste Water Research Commission, Pretoria, South Africa, 2001 | 10 | 2001 |
| Rationale for an ecological risk approach for South African water resource management S Jooste, M Claassen Water SA 27 (3), 283-292, 2001 | 9 | 2001 |
| The transcend-TB3 project: A methodology for the trans-boundary waters opportunity analysis (The TWO Analysis) D Phillips, JA Allan, M Claassen, J Granit, A Jägerskog, E Kistin, M Patrick, ... Prepared for the Ministry of Foreign Affairs, Sweden, 2008 | 8 | 2008 |
| Development and uptake of scenarios to support water resources planning, development and management: examples from South Africa N Funke, M Claassen, S Nienaber Water Resources Planning, Development and Management, 1-27, 2013 | 7 | 2013 |
