Le, Trung Thanh, 		Bui, Thi Thuy, AND 		Dang, The Ngoc.
" On-chip All-optical Haar Transform based on a 4x4 MMI coupler cascaded with a 2x2 MMI coupler for Image Compression" <em>VNU Journal of Science: Computer Science and Communication Engineering</em> [Online], (16 December 2022)