References:

Hershon, P. (n.d.). American Sign Language Phonology . Retrieved from http://nshsasl2.weebly.com/uploads/5/2/8/7/5287242/five_paramters_of_asl_in_pdf.pdf

O. Crasborn, Mesch, J., Waters, D., Nonhebel, A., Kooij, E. v. d., Woll, B., & Bergman, B. (2007). Sharing sign language data online: experiences from the ECHO project. International Journal of Corpus Linguistics, 12(4), 535-562.