“Biodiesel Production Using Helianthus Annuus (Sunflower) Seed Oil by Trans-Esterification Method”. Bioremediation Science and Technology Research (e-ISSN 2289-5892) 8, no. 2 (December 31, 2020): 24–27. Accessed May 11, 2026. https://journal2.hibiscuspublisher.com/index.php/BSTR/article/view/555.