DietrichD.KorschDietrichD., Closed Form Solution for Three-Mirror Telescopes, Corrected for Spherical Aberration, Coma, Astigmatism, and Field Curvature, „Applied Optics”, 11, 1972, s. 2986, DOI: 10.1364/AO.11.002986, Bibcode: 1972ApOpt..11.2986K.
DietrichD.KorschDietrichD., Closed Form Solution for Three-Mirror Telescopes, Corrected for Spherical Aberration, Coma, Astigmatism, and Field Curvature, „Applied Optics”, 11, 1972, s. 2986, DOI: 10.1364/AO.11.002986, Bibcode: 1972ApOpt..11.2986K.