Evaluation of the environmental measurements, through a proficiency test, of the environmental laboratories of Nicaragua and Costa Rica. Revista Científica Estelí, [S. l.], n. 35, p. 121–140, 2020. DOI: 10.5377/farem.v0i35.10280. Disponível em: https://revistas.unan.edu.ni/index.php/Cientifica/article/view/2144. Acesso em: 7 aug. 2025.