Use of shell ash from Musa paradisiacal variety Valery as a basic heteroge-neous catalyst in obtaining biodiesel. Scién. Inge. [Internet]. 2021 Dec. 1 [cited 2026 Jul. 18];17(4):63-9. Available from: https://revistas.unitru.edu.pe/index.php/PGM/article/view/4066