The models for the paper:

Harris KD, Dashevskiy T, Mendoza J, Garcia AJ, Ramirez JM, Shea-Brown
E (2017) Different roles for inhibition in the rhythm-generating
respiratory network. J Neurophysiol :jn.00174.2017
doi: 10.1152/jn.00174.2017

are available at the authors web site:

http://github.com/kharris/prebotc-graph-model