31: 83–111. doi:10.1146/annurev.pp.31.060180.000503. ↑ Labandeira, C. C.; Dilcher, DL; Davis, DR; Wagner, DL (1994). "Ninety-seven million years of angiosperm-insect association: paleobiological insights into the meaning of coevolution". Proceedings of the National Academy of Sciences.