Basically I am looking to map the institutional framework and arrangements for rooftops for city level implementation.My focus is only on German cities.My first task is to zero in on a city that has successful programs .Munich or Freibourg could be an option for success stories.But I am unable to actually find literature or case studies in this context.Would appreciate it if somebody can point me in that direction.
Also if I want to extend it into a comparative study..it would be helpful to have some examples of German cities where rooftop program did not work ......