Maghsoodlou, Malek Taher, Masoumnia, Amin, Mousavi, Mir Rasul, Hazeri, Nourollah, Aboonajmi, Jasem, Habibi-Khorasani, Sayyed Mostafa, Kiaee, Shiva. “A green protocol for synthesis of pyran annulated hetrocyclic systems using Na2SO4 as an efficient catalyst.” Iranian Journal of Catalysis, vol. 5, no. 2, 2015, pp. 169-174.