1. DoDI 1322.26 xAPI reference.
https://adlnet.gov/policy/dodi-xapi/
. Accessed 14 Jun 2020
2. HTMLMediaElement.
https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement
. Accessed 14 Jun 2020
3. Ahmed, F., Shubek, K., Hu, X.: Towards a GIFT enabled 3A learning environment. In: Goldberg, B.S. (ed.) Proceedings of the Eighth Annual GIFT Users Symposium (GIFTSym8), pp. 87–92, May 2020
4. Amazon Web Services: Amazon rekognition developer guide.
https://docs.aws.amazon.com/rekognition/latest/dg/rekognition-dg.pdf
. Accessed 30 May 2020
5. API, M.A.F.: Facial recognition software|microsoft azure.
https://azure.microsoft.com/en-us/services/cognitive-services/face/
. Accessed 30 May 2020