%0 Journal Article %A Mahnaz Farahi %A Bahador Karami %A Masume Azari %T Tungstate sulfuric acid as an efficient catalyst for the synthesis of benzoxazoles and benzothiazoles under solvent-free conditions %J Comptes Rendus. Chimie %D 2013 %P 1029-1034 %V 16 %N 11 %I Elsevier %R 10.1016/j.crci.2013.03.009 %G en %F CRCHIM_2013__16_11_1029_0