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This work, textual and graphical, is intellectual property of Maurizio Giau. It is now online for 19 years, 11 months, 2 days. You are free to download the tutorial or the whole site for personal use or even for teaching use, provided that you mention the source. You are NOOOT allowed to re-distribute this work passing it off as yours, nor to sell it to anyone, for any reason.
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Even though we guarantee the reliability of the formulas in the tutorial, we're not responsible in any way for malfunctions or damages deriving by their application. Similarly we decline any responsibility in order to disruption of your family life deriving by repeated and prolonged frequentations of this site.
By downloading anything from this site, you explicitly accept the above statements.