http://dx.doi.org/10.1098/rspb.2003.2512 (Publisher version)
Stensmyr, M., Dekker, T., & Hansson, B. (2003). Evolution of the olfactory code in the Drosophila melanogaster subgroup. Proceedings of the Royal Society B: Biological Sciences, 270(1531), 2333-2340. doi:10.1098/rspb.2003.2512.