1. The Atacama Large Millimeter/Submillimeter Array
2. SOFIA Project. https://www.nasa.gov/mission_pages/SOFIA/
3. A. Coppolecchia et al, “OLIMPO: A 4-bands imaging spectro-photometer for balloon-borne observations of the Sunyaev-Zel'dovich effect,” in New Horizons for Observational Cosmology, 2014.
4. Millimetron—a large Russian-European submillimeter space observatory
5. List of radio telescopes, From Wikipedia, the free encyclopedia. Available: https://en.wikipedia.org/wiki/List_of_radio_telescopes.