D. Tholen, D. Farnocchia: Detection of Yarkovsky Acceleration of (99942) Apophis. In: Aas/Division for Planetary Sciences Meeting Abstracts. 52. Jahrgang, Nr.6, 1. Oktober 2020, S.214.06, bibcode:2020DPS....5221406T (harvard.edu [abgerufen am 10. November 2020]).