@article{ijtech-5938,
				title={Optimized Calibration Plan based on Gray Model GM(1,1) applied in Physical-Photometric and Chemical Laboratories Accredited by ISO/IEC 17025},
				author={Carlos Velásquez,Francisco Iturra,Francisco  Espín,Consuelo  Chasi},
				volume={15},
				number={5},
				year={2024},
				month={Sep},
				pages={1438-1448},
				DOI={https://doi.org/10.14716/ijtech.v15i5.5938},
				journal={International Journal of Technology},
				ISSN={2087-2100}}