Zaiton, A., R. J. Green, M. Leeson, and M. D. Higgins. “Experimental Study of Straight Guiding Structures for Optical Wireless Communications Within a Vehicular Environment”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 2-8, Sept. 2017, pp. 119-22, https://jtec.utem.edu.my/jtec/article/view/2640.