Baligod, Raphael, Leis Alemania, Alaiza P. Dabatos, and Adomar L. Ilao. 2017. “Skin-Tone Segmentation in Real-Time Vision of Basic Hand Sign Through Pattern Recognition Using Hidden Markov”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 9 (2-3):145-48. https://jtec.utem.edu.my/jtec/article/view/2344.