1. ASTM. (2005). “Standard practice for determination of dead loads and live loads associated with green roof systems.” E2379-05 West Conshohocken PA.
2. Behm M. (2011). “Rooftop vegetation: an opportunity to influence green buildings via prevention through design.” Proc. CIB W99 2011 Int. Conf.—Prevention: Means to the End of Construction Injuries Illnesses and Fatalities International Council for Research and Innovation in Building and Construction Rotterdam Netherlands.