- Instruments used widely from Antiquity until around the 17th century in observational astronomy and navigation for complex astronomical and geometrical calculations with respect to the positions of the Sun, planets and stars, time, geographical latitude and the direction of the North, as well as the determination of horoscopes in astrology.
- Bennett 2003a
- Wintroub 2000
- Katsiadakis Helen (AA)
- Mergoupi-Savaidou Eirini (AA)
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Created 2019-10-29, last modified 2020-06-29