Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Rutschmann, Frank; Eriksson, Torsten; Salim, Kamariah Abu; Conti, Elena (2007). Assessing calibration uncertainty in molecular dating: the assignment of fossils to alternative calibration points. Systematic Biology, 56(4):591-608.