MOHAMMAD, Karim Aly; ZEKRY, Abdelhalim; ABOUELATTA, Mohamed. LED Based Spectrophotometer can compete with conventional one. International Journal of Engineering and Technology, [S. l.], v. 4, n. 2, p. 399–407, 2015. DOI: 10.14419/ijet.v4i2.4504. Disponível em: https://www.sciencepubco.com/index.php/IJET/article/view/4504. Acesso em: 27 jun. 2026.