López-Mesas, M., F. Carrillo, M. C. Gutiérrez, and M. Crespi. “Alternative Methods for the Wool Wax Extraction from Wool Scouring Wastes”. Grasas Y Aceites, vol. 58, no. 4, Dec. 2007, pp. 402-7, doi:10.3989/gya.2007.v58.i4.453.