@online{ timsrc, author = "Hermann, Winfried", title = "Possibilities of Influence for a Sustainable Development", publisher = "Universität Tübingen", year = "2010", month = "Sep", day = "25", url = "https://timms.uni-tuebingen.de:443/tp/UT_20100925_002_summit_0001", urldate = "2024-11-23" }