X. Yang, W. Shang, L. Li, J. Zhao, X. Wang, and C. Tang, “Preparation of Mesoporous Carbon Using Phenol-Formaldehyde Resin as Carbon Precursor and Ethylene Glycol as Pore-Forming Agent”, ajc, vol. 26, no. 21, pp. 7204–7206, Sep. 2014.