1. Silica Boron Sulfonic Acid as Heterogeneous and Highly Efficient Solid Acid Catalyst For the Preparation of Hantzsch 1,4-dihydropyridines Under Solvent-Free sami sajjadifar; Pegah Masoudi Volume 30, Issue 1, Winter 2019, Pages 33-40 10.22059/jsciences.2019.69630 View Article PDF 171.84 K