%0 Journal Article %T Synthesis, characterization and first application of keggin-type heteropoly acids supported on silica coated NiFe2O4 as novel magnetically catalysts for the synthesis of tetrahydropyridines %A Eshghi, Hossein %A Amir Khojastehnezhad %A Farid Moeinpour %A Bakavoli, Mehdi %A Seyedi, Seyed Mohammad %A Abbasi, Mohsen %J RSC Advances %@ 2046-2069 %D 2014