9021 Fagus jẹ́ plánẹ́tì kékeré ní ibi ìgbàjá ástẹ́rọ́ìdì. Lutz D. Schmadel (10 June 2012). Dictionary of Minor Planet Names. Springer Science & Business Media. pp. 1378–. ISBN 978-3-642-29718-2. http://books.google.com/books?id=aeAg1X7afOoC&pg=PA1378.