| Electric cars: technical characteristics and environmental impacts E Helmers, P Marx Environmental Sciences Europe 24, 1-15, 2012 | 321 | 2012 |
| Hospital effluents as a source of gadolinium in the aquatic environment K Kümmerer, E Helmers Environmental science & technology 34 (4), 573-577, 2000 | 281 | 2000 |
| Geochemical behaviour of platinum-group elements (PGE) in particulate emissions by automobile exhaust catalysts: experimental results and environmental investigations F Zereini, B Skerstupp, F Alt, E Helmers, H Urban Science of the Total Environment 206 (2-3), 137-146, 1997 | 218 | 1997 |
| Platinum emission rate of automobiles with catalytic converters: Comparison and assessment of results from various approaches E Helmers Environmental Science and Pollution Research 4, 99-103, 1997 | 179* | 1997 |
| European hospitals as a source for platinum in the environment in comparison with other sources K Kümmerer, E Helmers, P Hubner, G Mascart, M Milandri, F Reinthaler, ... Science of the Total Environment 225 (1-2), 155-165, 1999 | 174 | 1999 |
| Critical evaluation of the European diesel car boom-global comparison, environmental effects and various national strategies M Cames, E Helmers Environmental Sciences Europe 25, 1-22, 2013 | 173 | 2013 |
| Energy efficiency trade-offs in small to large electric vehicles M Weiss, K Cloos, E Helmers Environmental Sciences Europe 32, 17, 2020 | 170 | 2020 |
| Platinum and rhodium in a polluted environment: studying the emissions of automobile catalysts with emphasis on the application of CSV rhodium analysis E Helmers, N Mergel Fresenius' journal of analytical chemistry 362, 522-528, 1998 | 137 | 1998 |
| Hospital effluents as a source for platinum in the environment K Kümmerer, E Helmers Science of the total environment 193 (3), 179-184, 1997 | 130 | 1997 |
| Distribution of platinum group elements (Pt, Pd, Rh) in environmental and clinical matrices: Composition, analytical techniques and scientific outlook: Status report T Hees, B Wenclawiak, S Lustig, P Schramel, M Schwarzer, M Schuster, ... Environmental Science and Pollution Research 5, 105-111, 1998 | 123 | 1998 |
| Comparison of palladium and platinum in environmental matrices: palladium pollution by automobile emissions? E Helmers, M Schwarzer, M Schuster Environmental Science and Pollution Research 5, 44-50, 1998 | 120 | 1998 |
| Road-rail intermodal freight transport as a strategy for climate change mitigation JT de Miranda Pinto, O Mistage, P Bilotta, E Helmers Environmental development 25, 100-110, 2018 | 111 | 2018 |
| Fully electric and plug-in hybrid cars-An analysis of learning rates, user costs, and costs for mitigating CO2 and air pollutant emissions M Weiss, A Zerfass, E Helmers Journal of cleaner production 212, 1478-1489, 2019 | 105 | 2019 |
| Sensitivity analysis in the life-cycle assessment of electric vs. combustion engine cars under approximate real-world conditions E Helmers, J Dietz, M Weiss Sustainability 12 (3), 1241, 2020 | 104 | 2020 |
| Electric car life cycle assessment based on real-world mileage and the electric conversion scenario E Helmers, J Dietz, S Hartard The International Journal of Life Cycle Assessment 22, 15-30, 2017 | 91 | 2017 |
| Platin in Klärschlammasche und an Gräsern E Helmers, N Mergel, R Barchet Umweltwissenschaften und Schadstoff-Forschung 6 (3), 130-134, 1994 | 91 | 1994 |
| Carbon footprinting of universities worldwide: Part I—objective comparison by standardized metrics E Helmers, CC Chang, J Dauwels Environmental Sciences Europe 33 (30), 1-25, 2021 | 90 | 2021 |
| Elements accompanying platinum emitted from automobile catalyst's E Helmers Chemosphere 33 (3), 405-419, 1996 | 88 | 1996 |
| CO2-equivalent emissions from European passenger vehicles in the years 1995–2015 based on real-world use: Assessing the climate benefit of the European “diesel boom” E Helmers, J Leitão, U Tietge, T Butler Atmospheric Environment 198, 122-132, 2019 | 86 | 2019 |
| A new hybrid method for reducing the gap between WTW and LCA in the carbon footprint assessment of electric vehicles A Moro, E Helmers The International Journal of Life Cycle Assessment 22, 4-14, 2017 | 78 | 2017 |
