Moeinzadeh, Roya, Asareh, Hadi, Kiasat, Ali Reza. Synthesis of Unsymmetrical Ethers Catalysed by Polyvinyl Sulfuric Acid & PVSA / Nano RH SiO2 as a Novel Solid Acid Nanocomposite. Journal of Nanoanalysis. 2017;4(3):189-195. doi:10.22034/jna.2017.539361