M. Sezgin & B. Sankur (2004). “Survey over image thresholding techniques and quantitative performance evaluation”. Journal of Electronic Imaging13 (1): 146-165. doi:10.1117/1.1631315.
Lee, Sang Uk and Chung, Seok Yoon and Park, Rae Hong (1990). “A comparative performance study of several global thresholding techniques for segmentation”. Computer Vision, Graphics, and Image Processing52 (2): 171-190. doi:10.1016/0734-189x(90)90053-x.
Zhang, Jun & Hu, Jinglu (2008). “Image segmentation based on 2D Otsu method with histogram analysis”. Computer Science and Software Engineering, 2008 International Conference on6: 105-108. doi:10.1109/CSSE.2008.206. ISBN978-0-7695-3336-0.