Development of a Microcontroller-Based Portable Hemoglobin Meter Using Optical Sensing Techniques. International Journal of Food and Nutritional Sciences, [S. l.], v. 12, n. 1, p. 8682–8688, 2023. Disponível em: https://www.ijfans.org/index.php/Journal/article/view/2695. Acesso em: 23 sep. 2026.