Natural fibres as ecologic flame retardants in green agro-plastic building products?. Internationales Symposium: naro.tech Werkstoffe aus Nachwachsende Rohstoffen, Erfurt, 2014. [PUMA: biomat dahy ecologic product natural building knippers retardant agro-plastic biobased itke from:petraheim 2014 flame architecture fibre]