BADRI R, REZA KIASAT A, KESHAVARZ M. Silica Phosphoric Acid as an Efficient Heterogeneous Catalyst for Protection of Carbonyl Groups Under Solvent Free Conditions. ajc [Internet]. 2010 Mar. 30 [cited 2024 Oct. 3];20(1):543-6. Available from: https://asianpubs.org/index.php/ajchem/article/view/19441