1. 150 000 000 photos. http://blog.instagram.com/ post/8758450298/150-000-000-photos August 2011. 150 000 000 photos. http://blog.instagram.com/ post/8758450298/150-000-000-photos August 2011.
2. Here's how to use instagram. http://www. businessinsider.com/instagram-2010--11--op=1 May 2011. Here's how to use instagram. http://www. businessinsider.com/instagram-2010--11--op=1 May 2011.
3. Testing testing... http://blog.instagram.com/post/ 8758396471/testing-testing July 2011. Testing testing... http://blog.instagram.com/post/ 8758396471/testing-testing July 2011.
4. A demographic portrait of users of various social media services. http://pewinternet.org/Reports/2013/ Social-media-users/ Social-Networking-Site-Users/Demo-portrait. aspx 2013. A demographic portrait of users of various social media services. http://pewinternet.org/Reports/2013/ Social-media-users/ Social-Networking-Site-Users/Demo-portrait. aspx 2013.
5. Face++. http://en.faceplusplus.com/ 2013. Face++. http://en.faceplusplus.com/ 2013.