Chen, Zhi-Wei, et al. “Quantitative Optical Transmittance, Turbidity, and Camera-Obscuration Benchmarking of a Low-Cost Cocoa Hematemesis Simulant Versus Commercial Simulated Blood”. International Review of Applied Sciences, Technology, and Sustainable Progress, vol. 16, no. 10, Oct. 2026, pp. 1-18, https://elarastudy.com/index.php/IRASTSP/article/view/QuantitativeOpticalTransmittance.