@unpublished{rechberger15[TUW-238338], author = {Rechberger, Helmut}, title = {{C}ities: {T}omorrow's material reservoirs}, year = {2015}, note = {eingeladen; {V}ortrag: {E}uropean {G}eosciences {U}nion, {G}eneral {A}ssembly 2015, {W}ien; 2015-04-12 -- 2015-04-17} }