Stadler, Michael; Lipman, Tim & Marnay, Chris. Actual trends of decentralized CHP integration -- The Californianinvestment subsidy system and its implication for the energy efficiencydirective (Aktuelle Trends in der dezentralen KWK Technologie Integration-- Das kalifornische Fordermodell und dessen Implikation fur dieEndenergieeffizienzrichtlinie), article, January 17, 2007; (https://digital.library.unt.edu/ark:/67531/metadc896823/m1/1/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .