update README

README.md

@@ -35,3 +35,4 @@ If you use `fafbseg` for your publication, please cite the two FlyWire papers:
 1. "_Whole-brain annotation and multi-connectome cell typing quantifies circuit stereotypy in Drosophila_" Schlegel _et al._, bioRxiv (2023); doi: https://doi.org/10.1101/2023.06.27.546055
 2. "_Neuronal wiring diagram of an adult brain_" Dorkenwald _et al._, bioRxiv (2023); doi: https://doi.org/10.1101/2023.06.27.546656
 
+Depending on what data you used (e.g. neurotransmitter predictions) you might need to cite additional publications. Please see the [Citation Guidelines](https://codex.flywire.ai/about_flywire) on Codex.