Lester, Dan; Friedman, Ed; Lillie, Charles (August 2005). "Strategies for servicing the Single Aperture Far IR (SAFIR) telescope". In MacEwen, Howard A (ed.). UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts II. Proceedings of the SPIE. Vol. 5899. pp. 184–195. Bibcode:2005SPIE.5899..184L. doi:10.1117/12.624242. S2CID122186526.
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Lester, Dan; Friedman, Ed; Lillie, Charles (August 2005). "Strategies for servicing the Single Aperture Far IR (SAFIR) telescope". In MacEwen, Howard A (ed.). UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts II. Proceedings of the SPIE. Vol. 5899. pp. 184–195. Bibcode:2005SPIE.5899..184L. doi:10.1117/12.624242. S2CID122186526.
Lester, Dan; Friedman, Ed; Lillie, Charles (August 2005). "Strategies for servicing the Single Aperture Far IR (SAFIR) telescope". In MacEwen, Howard A (ed.). UV/Optical/IR Space Telescopes: Innovative Technologies and Concepts II. Proceedings of the SPIE. Vol. 5899. pp. 184–195. Bibcode:2005SPIE.5899..184L. doi:10.1117/12.624242. S2CID122186526.