Ahmed, M.H. 2001. Comparison studies of propylene oxide addition to phenyloctadecanol and phenyloctadecanoic acid and the surface activity studies of their sulphated products. Grasas y Aceites. 52, 5 (Oct. 2001), 285–290. DOI:https://doi.org/10.3989/gya.2001.v52.i5.369.