Singh S, Anjali Gaur, Singh D, Singh D. Two Echelon Supply Chain Model with lead time and effect of carbon emission under fuzzy environment. Braz. J. Biom. [Internet]. 2026 Feb. 13 [cited 2026 Mar. 3];44(1):e-44823. Available from: http://200.131.250.9/index.php/BBJ/article/view/823