Yan Leng, Jun Wang, Dunru Zhu, Lei Shen, Pingping Zhao, Mingjue Zhang, Heteropolyanion-based ionic hybrid solid: A green bulk-type catalyst for hydroxylation of benzene with hydrogen peroxide, Chemical Engineering Journal 2011, 173, 620-626 (Featured online on Advances in Engineering (http://advancesinengineering.com/))???