1. http://www.engineeringchallenges.org/ http://www.engineeringchallenges.org/
2. http://www.un.org/sustainabledevelopment/sustainable-development-goals/ http://www.un.org/sustainabledevelopment/sustainable-development-goals/
3. https://www.pearsonhighered.com/program/Shneiderman-Designing-the-User-Interface-Strategies-for-Efective-Human-Computer-Interaction-6th-Edition/PGM327860.html https://www.pearsonhighered.com/program/Shneiderman-Designing-the-User-Interface-Strategies-for-Efective-Human-Computer-Interaction-6th-Edition/PGM327860.html