Summerfield, R. J. 1999. Timing it right: the measurement and prediction of flowering. – Acta Agron. Hung. 47: 203–213. 
Sack L, Cornwell WK, Santiago LS, Barbour MM, Choat B, Evans JR, Munns R, Nicotra A. 2010. A unique web resource for physiology, ecology and the environmental sciences: PrometheusWiki. Functional Plant Biology 387: 687-693.
IPBES (2019). Summary for policymakers of the global assessment report on biodiversity and ecosystem services of the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services.