Cerulli-Harms, A. et al. (2023). The performance of the Package Travel Directive and broader consumer protection issues in the implementation of passenger rights. Study requested by the IMCO Committee
Gossen, M. & Lell, O. (2023). Sustainable consumption in the digital age. A plea for a systemic policy approach to turn risks into opportunities. GAIA 32/S1 (2023): 71 – 76.
Gossen, M., Frick, V., Lell, O. & Scholl, G. (2022). Politik für nachhaltigen Konsum in der digitalen Welt; Policy Paper im Auftrag des Umweltbundesamtes.
Rauber, J., Lell, O. & Muster, V. (2022). Less traffic, more quality of life – Guidelines for communicating sufficiency as a goal of municipal transport policy. Publication on behalf of the Federal Environment Agency
Lell, O., Kettner, S. E., Thorun, C. & Bendig, T. (2021). Verbraucherschutz digital neu denken: Consumer Protection Technologies – Politische Relevanz, Potential und Handlungsbedarf.
Lell, O. & Kettner, S. E. (2021). Kurzgutachten zu Amazon Alexa. Eine exemplarische Untersuchung zu den Einsatzmöglichkeiten von digitalen Sprachassistenten für Voice Commerce und IoT-Steuerung und zu den Auswirkungen auf Verbraucherinteressen und Wettb
Lell, O. & Thorun, C. (2021). Organisation des Verbraucherschutzes in ausgewählten europäischen Ländern. Studie im Auftrag des Österreichischen Bundesministeriums für Soziales, Gesundheit, Pflege und Konsumentenschutz.
Lell, O.; Muster, V.; Thorun, C. (2020), Förderung des nachhaltigen Konsums durch digitale Produktinformationen: Bestandsaufnahme und Handlungsempfehlungen. UBA texts 212/2020
Lell, O. (2013). A demand oriented transport system: Opportunities for consumers, new ways for transport policy. In: Internationales Verkehrswesen (65) issue No. 4/2013, pp. 11.
Lell, O. (2012). Climate Protection from a consumer perspective. In: Wirtschaftsdienst – Zeitschrift für Wirtschaftspolitik, Sonderheft 2012 "Instrumentenmix in der Klimapolitik – nationale und regionale Herausforderungen", pp. 37.
Lell, O. & Höltmann, I. (2012). Mobility of the future from a consumer perspective: sustainable, interconnected and affordable. Edited by Verbraucherzentrale Bundesverband e.V.
Lell, O. (2010). Services for citizens and consumers: political perspectives for energy, water and rail transport. FES WISO Diskurs.
Lell, O. (2008). Public Corporate Governance from a consumer perspective. In: Gesellschaft für öffentliche Wirtschaft (Ed.), Corporate Governance in der öffentlichen Wirtschaft, pp. 141.
Lell, O. (2008). Travelling with bus, railway and airplane – A case for consumer politics!, FES WISO-direkt.
Lell, O. (2005). Is water a product? Liberalization and privatization of drinking water supply from the perspective of the Federation of German Consumer Organizations. In: José Lozan, Hartmut Graßl et al. (ed.), Warnsignal Klima, pp. 361.
Lell, O. (2004). The new labelling requirement for genetically engineered food – An infringement of world trade law? EuZW 2004, pp. 108.
Lell, O. & Steudte, C. (2003). EC and marine environmental protection with a special focus on the draft Water Framework Directive. In: Czybulka, D. (Ed.), Naturschutz und Rechtsregime im Küsten- und Offshore-Bereich; Nomos publishing: Baden-Baden.
Lell, O. (2003). Legal questions of environmental product labelling in German, European and international law. UTR volume 69, Erich Schmidt Verlag: Berlin.
Lell, O. (2001). Protection oft he seas against pollutants – Conflicts between EC law and international law, ZUR 2001, pp. 138.
Lell, O. & Rechenberg, J. (2001). Overburdened legislative procedure? An inside view from the consultations on the Water Framework Directive. ZUR 2001, Sonderheft: Aktuelle Fragen des Gewässerschutzes, pp. 174.
Brackemann, H. et al. (2000). Liberalization of the German water supply – Effects on health and environment, outline of a framework for a competitive water resource, German Federal Environmental Agency, publication 2/00.
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