Kosiarek, M.; Nisley, I.; Patra, K.; Hatano, R.; Bates, H.; Chavez, E.; et al. (July 2017). "Rotation Period of Asteroid 3494 Purple Mountain". The Minor Planet Bulletin. 44 (3): 171–172. Bibcode:2017MPBu...44..171K. ISSN1052-8091.
Cantu, Sarah A.; Kozdon, Janus; Montgomery, Kent; Lyons, Vanessa (July 2016). "Lightcurves and Rotational Periods of Three Main-belt Asteroids". The Minor Planet Bulletin. 43 (3): 210–212. Bibcode:2016MPBu...43..210C. ISSN1052-8091.
Kosiarek, M.; Nisley, I.; Patra, K.; Hatano, R.; Bates, H.; Chavez, E.; et al. (July 2017). "Rotation Period of Asteroid 3494 Purple Mountain". The Minor Planet Bulletin. 44 (3): 171–172. Bibcode:2017MPBu...44..171K. ISSN1052-8091.
Cantu, Sarah A.; Kozdon, Janus; Montgomery, Kent; Lyons, Vanessa (July 2016). "Lightcurves and Rotational Periods of Three Main-belt Asteroids". The Minor Planet Bulletin. 43 (3): 210–212. Bibcode:2016MPBu...43..210C. ISSN1052-8091.