1. BDEW – Power Capacity and Production in 2020, n.d. https://www.bdew.de/service/daten-und-grafiken/kapazitaet-erzeugung-2020/.
2. Hydrogen Economy Outlook, Key Messages,2020
3. Studie: Integration von Wind-Wasserstoff-Systemen in das Energie System;NOW (German National Organisation of Hydrogen and Fuel-cell Technology),2014
4. Sector Coupling in Europe: Powering Decarbonization;BloombergNEF,2020
5. M. Sterner, et al., Handbook of Energy Storage, Springer, 87.