Zikra, Muhammad, 		Hashimoto, Noriaki, 		Yamashiro, Masaru, AND 		Suzuki, Kojiro.
" Transformation of Directional Wave Spreading in the Surf Zone Using Video Image Data" <em>Journal of Ocean, Mechanical and Aerospace -science and engineering-</em> [Online], Volume 4 Number 1 (20 February 2014)