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2. Assessing the relative ecological carrying impacts of resource extraction;Trusty,1994
3. Kreijer P.C., Ecological properties of building materials. Materials and Structures v. 20, n. 118, p. 248–254.
4. Concrete progress from antiquity to the third millennium;Idorn,1997
5. High-Alkali cements for 21st century concrete;Davidovits,1994