1. ASHA. (2019). Medicare coverage policy on speech-generating devices. Retrieved from https://www.asha.org/practice/reimbursement/medicare/sgd_policy/
2. A Mandarin Language System in Augmentative and Alternative Communication (AAC)
3. Baker, B. R., Yao, T., Andres, P., Mark, A. & Zucco, M. A. (2014, October). Pictorial keyboard with polysemous keys for Chinese character output. Retrieved from https://www.researchgate.net/profile/Bruce_Baker8
4. Use of Speech-Generating Devices: In Support of Natural Speech