1. Technical and economical demands on 25–77K refrigerators for future HTS-series products in power engineering;Gromoll,2004
2. Thermosyphon cooling system for the Siemens 400kW HTS synchronous machine;Frank,2004
3. Design and operating performance of cryocooled helium thermosyphon loops for HTS transformers;Schwenterly,2004
4. A pulse tube cryocooler with 300W refrigeration at 80K and an operating efficiency of 19% carnot;Zia;Cryocoolers,2007
5. Stirling-type pulse tube cryocooler with 1kW of refrigeration at 77K;Potratz,2008