1. Grafica asistata de calculator, note de curs

2. http://labs.cs.utt.ro/labs/Graphics/html/EGC/Lucrarea12.html

3. http://labs.cs.utt.ro/labs/Graphics/html/EGC/Lucrarea5.html

4. http://labs.cs.utt.ro/labs/Graphics/html/EGC/Lucrarea10.html