TY - JOUR AU - Rezayati, Sobhan AU - Javanmardi, Parisa TI - Phospho sulfonic acid: an efficient solid acid catalyst for the facile preparation of 1,4-dihydropyridines JO - Iranian Journal of Catalysis VL - 5 IS - 2 SP - 123 EP - 127 PY - 2015 DO - ER -