FAIZAL, A.; WAHYUDI, S.; WINARTO, W.; TAMA, I. P. Identification of response surface patterns in ultrasound-assisted transesterification of castor oil using CaO-MgO catalysts derived from blood cockle shell and limestone. Eastern-European Journal of Enterprise Technologies, [S. l.], v. 3, n. 6 (141), p. 23–33, 2026. DOI: 10.15587/1729-4061.2026.364663. Disponível em: https://journals.uran.ua/eejet/article/view/364663. Acesso em: 6 jul. 2026.