Christian Doppler (1803-1853) and the impact of Doppler effect in astronomy Gudrun Wolfschmidt — 2005 Acta Universitatis Carolinae. Mathematica et Physica
Josef Petzval (1807-1891) and the early development of astrophotography Gudrun Wolfschmidt — 2005 Acta Universitatis Carolinae. Mathematica et Physica