Copyright / Disclaimer / Privacy


A3D makes all reasonable efforts to ensure that the contents of this website are accurate and up-to-date, however cannot accept responsibility for omissions, errors or consequent changes.
The content of all teaching materials on this website is the sole responsibility of the authors


All text, images and graphics, design and other content of this website is copyright © A3D. All rights are reserved.
Users may download any part of this website for private, personal use, such as reference.
For any other use, permission should be sought from the copyright owner (email:


When using our website you may be asked to supply personal data. Providing this information is voluntary given, your personal data is used in strict accordance with Portuguese data protection laws.
No personal information is automatically collected from users of this website. Some non-personal information, such as a user's internet service provider, the length of user visits and user requests made during visits, may be collected. This is done by the use of a 'cookie'*.
Only personal information, such as names & phone numbers that users provide voluntarily (via online forms) will be collected, and only used for the purpose that it is intended. We do not collect any other personal information via this website.
* A cookie is a small piece of data which is sent to the user's web browser and saved on the user's hard drive. We use this information to provide us with general statistical Information such as the number of visits our website receives. The collection of such information via cookies is standard practice on most Web sites.