These few pages (166 to 171) have some cool tricks.
http://books.google.com/books?id=RuMDAAAAMBAJ&lpg=PP1&hl=pt-PT&pg=PA166#v=onepage&q&f=true
http://books.google.com/books?id=RuMDAAAAMBAJ&lpg=PP1&hl=pt-PT&pg=PA166#v=onepage&q&f=true
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