Jani , B R, K V Shah, and P P Kapupara. “FREE SALE CERTIFICATE (EXPORT CERTIFICATE)”. International Journal of Research and Development in Pharmacy & Life Sciences 4, no. 3 (May 15, 2015): 1470-1488. Accessed October 16, 2025. https://ijrdpl.com/index.php/ijrdpl/article/view/461.