http://richardisrael.com/blog/

http://books.google.cl/books?id=FZIE7mO1FZ0C&printsec=frontcover&dq=tony+buzan+richard+israel&source=bl&ots=VbWan_PdvR&sig=PKfARYInZ_1JyAaT9AWs-UVcyQc&hl=es&ei=W8VVTcL2PIGKlwf8msnxBw&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCAQ6AEwAg#v=onepage&q&f=false

http://books.google.cl/books?id=dbsD7PyovUYC&printsec=frontcover&dq=tony+buzan+richard+israel&source=bl&ots=u9ZYM-cvCg&sig=bxH7d4cdmuqTxCoGixuFjOJH56s&hl=es&ei=KcZVTd7cIYSclgfSmNGaBw&sa=X&oi=book_result&ct=result&resnum=6&ved=0CC4Q6AEwBQ#v=onepage&q&f=false

http://www.ashgate.com/default.aspx?page=1751&calctitle=1&pageSubject=1182&title_id=3380&edition_id=5542

http://www.mindchi.com/index.php/richard-israel/

http://www.technologyofsuccess.com/