Raab, W., Looney, W., Poglitsch, A., Geis, N., Hoenle, R., Rosenthal, D., & Genzel, R. (2003). FIFI LS: the optical design and diffraction analysis. In R. K., Melugin, & H.-P., Röser (Eds.), Airborne Telescope System II (pp. 166-174). Bellingsham: SPIE.