Schaefer, Bradley E. (2002). »The latitude and epoch for the formation of the southern Greek constellations«. Journal for the History of Astronomy. Zv. 33, part 4, št. 113. str. 313–50. Bibcode:2002JHA....33..313S. ISSN0021-8286.
Cooper, Tim (2003). »Presidential address: Amateur Observations – Successes and Opportunities«. Monthly Notes of the Astronomical Society of Southern Africa. Zv. 62. str. 234–240. Bibcode:2003MNSSA..62..234C.
Schaefer, Bradley E. (2002). »The latitude and epoch for the formation of the southern Greek constellations«. Journal for the History of Astronomy. Zv. 33, part 4, št. 113. str. 313–50. Bibcode:2002JHA....33..313S. ISSN0021-8286.