1. Technical and economical demands on 25 K–77 K refrigerators for future HTS-series products in power engineering;Gromol,2004
2. Thermosyphon cooling system for the Siemens 400kW HTS sychronous machine;Frank,2004
3. Design and operating performance of cryocooled helium thermosyphon loops for HTS transformers;Schwenterly,2004
4. Einstufiger 25 K Pulsrohrkuehler fuer HTS-Energie-Applikationen;Häfner,2003
5. A commercial pulse tube cryocooler with 200W refrigeration at 80K;Zia,2005