For Calyceraceae
Hellwig. 2007. In Kadereit, J.W., and C. Jeffrey. 2007. The families and genera of vascular plants. VIII. Flowering plants – Eudicots – Asterales. Springer, Berlin. 636 pp. Google Scholar
Pozner, R.E., L.E. Johnson, S.S. Denham. 2021. Evolution of flower morphology and a natural re-arrangement of Calyceraceae. Taxon. Google Scholar