Memoirs of the RoyalAstronomicalSociety, Vol. 49, p. 129 (1888) S. van den Bergh & R. C. Henry: The Supernova in NGC 4564, Journal of the Royal Astronomical
Christopher E. (באפריל 1990). "The Hungaria group of minor planets". Journal of the RoyalAstronomicalSocietyofCanada: 123–131. Bibcode:1990JRASC..84..123S. ISSN 0035-872X
new spectroscopic orbit for Delta Capricorni, Journal of the RoyalAstronomicalSocietyofCanada, vol. 86, no. 2, p. 105, 107 (1992) K. K Pan: Synchronization