Sasitharan Balasubramaniam, Stefanus A. Wirdatmadja, Michael Taynnan Barros, Yevgeni Koucheryavy, Michal Stachowiak, Josep Miquel Jornet Wireless Communications for Optogenetics-based Brain Stimulation: Present Technology and Future Challenges IEEE Communications Magazine 56 7 IEEE 218–224 2018 https://doi.org/10.1109/MCOM.2018.1700917