<Li> Jump up ^ "Walnut Council--Growing Walnut and Other Fine Hardwoods". </Li> <Li> Jump up ^ "Federlegno - Italian federation of wood producers and industry". Retrieved 13 May 2017 . </Li> <Li> Jump up ^ Fonte: http://www.federlegno.it/tool/home.php?s=0,1,29,37,417,1042 </Li> <Li> Jump up ^ Karade SR. 2003 . An Investigation of Cork Cement Composites . PhD Thesis . BCUC . Brunel University, UK . </Li>

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