Bittner SR, Williamson RC, Snyder AC, Litwin-Kumar A, Doiron B, Chase SM, Smith MA, Yu BM (2017) Population activity structure of excitatory and inhibitory neurons. PLoS One 12:e0181773

http://dx.doi.org/10.1371/journal.pone.0181773

can be found at

https://github.com/sbittner12/litwin-kumar_doiron_cluster_2012/