Magoswana, L. et al. 2021. Othonna koos-bekkeri Van Jaarsv. is a synonym of Othonna cerarioides Magoswana & J.C. Manning (Asteraceae: Othonninae). African Biodiversity & Conservation. 51, 2 (Oct. 2021). DOI:https://doi.org/10.38201/btha.abc.v51.i2.