Under CopyrightKeichel, CarstenCarstenKeichelGohla, MatthiasMatthiasGohla2022-03-0418.4.20152014https://publica.fraunhofer.de/handle/publica/23864310.24406/publica-fhg-238643de670Stoffliche Wiedergewinnung kostenintensiver Ressourcenbook article