1. The World Federation of the Deaf: https://wfdeaf.org/
2. American Speech-Language-Hearing Association (ASHA): https://www.asha.org/
3. A survey paper on Sign Language Recognition: Pilán, I., & Bustos, A. (2014, September). Sign language recognition: State of the art and future challenges https://www.researchgate.net/publication/262187093_Sign_language_recognition
4. Deepsign: Sign Language Detection and Recognition Using Deep Learning: https://www.mdpi.com/2079-9292/11/11/1780
5. Ghosh, S., & Munshi, S. (2012, March). Sign language recognition using support vector machine. In 2012 International Conference on Signal Processing, Computing and Communication (ICSPCC) (pp. 1-5). IEEE https://www.researchgate.net/publication/262233246_Sign_Language_Recognition_with_Support_Vector_Machines_and_Hidden_Conditional_Random_Fields_Going_from_Fingerspelling_to_Natural_Articulated_Words