Oldest Known Eucalyptus Macrofossils Are from South AmericaDOI: info:10.1371/journal.pone.0021084v. 6No. 6e21084
Gandolfo, María A., Hermsen, Elizabeth J., Zamaloa, María C., Nixon, Kevin C., González, Cynthia C., Wilf, Peter, Cúneo, N. Rubén, and Johnson, Kirk R. 2011. "Oldest Known Eucalyptus Macrofossils Are from South America." PLoS ONE, 6, (6) e21084. https://doi.org/10.1371/journal.pone.0021084.