Xu, Aina, Hongfang Ma, Haitao Zhang, Weiyong Ying, and Dingye Fang. “Phosphorus and Boron Co-Modified HZSM-5 Catalyst for Methanol to Conversion of Propylene”. Asian Journal of Chemistry 27, no. 1 (December 29, 2014): 301–306. Accessed May 7, 2024. https://asianpubs.org/index.php/ajchem/article/view/27_1_66.