Fonètica

http://usuaris.tinet.org/aragones/gramaticat/fonetica.htm

http://books.google.es/books?id=sIr7afxZKtQC&pg=PA175&lpg=PA175&dq=verbs+amb+e+oberta&source=bl&ots=Toc-J6eXNv&sig=rO-wTCW8DIEPQf_VGg98Tv5_5t4&hl=es&ei=XCbxTK-_CsyxhAefkLi2DA&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCgQ6AEwAg#v=onepage&q=verbs%20amb%20e%20oberta&f=false