1. Introduction to thermal energy storage systems;Cabeza;Adv Therm Energy Storage Syst,2014
2. Joint EASE/EERA recommendations for a European energy storage technology development roadmap towards 2030;European Association for Storage of Energy,2013
3. Fundamentals of technology roadmapping;Garcia,1997
4. Key performance indicators: a useful tool to assess smart grid goals;Personal;Energy,2014
5. Optimal energy management of urban rail systems: key performance indicators;González-Gil;Energy Convers Manag,2015