1. Abalakin, V. K. (2009). The pulkovo observatory on the centuries ‘Borderline’. In G. Wolfschmidt (Ed.), Cultural heritage: Astronomical observatories—From classical astronomy to modern astrophysics (pp. 60–75). Berlin: Hendrik Bäßler.
2. Benoist, C., Le Guet Tully, F., & Davoigneau, J. (2016). A survey of large meridian instruments across continents & time. In M. M. Ya (Ed.), Astronomy and world heritage: Across time and continents (pp. 164–171). Kazan: Publishing House of Kazan University.
3. Elmqvist Söderlund, I. (2009). The old stockholm observatory in a Swedish context and an argument for the necessity of an inventory of the Swedish astronomical heritage. In G. Wolfschmidt (Ed.), Cultural heritage: Astronomical observatories—From classical astronomy to modern astrophysics (pp. 234–249). Berlin: Hendrik Bäßler.
4. Finlay-Freundlich, E. (1969). Wie es dazu kam, daß ich den Einstein–Turm errichtete. Physikalische Blätter, 25, 538–541.
5. Gingerich, O. (1984). Astrophysics and twentieth–century astronomy to 1950. Cambridge, UK: Cambridge University Press; (The General History of Astronomy, Vol. IV, Part A).