The idea was developed by legal scholars like Christian Iaione (Italy) around 2007/2008. Published in two books on the so called in-house companies managing large local utilities networks and the regulation of urban mobility.
describe key features here
According to Iaione
the public-commons approach proved to work in a terrific way on small scale resources ... as the Bologna regulation shows.
Since 2015, via processes like Co-Bologna html 
, Co-Roma html , Co-City Turin html and html , different approaches for larger scale resources are being designed and tested.
# Sources
Sheila R. Foster and Christian Iaione, "The City as a Commons," 34 Yale Law & Policy Review 281 (2016) website
Sheila Foster, "The Co-City," American Journal of Economics and Sociology.
# See also Commons Public Partnership