%0 Journal Article %A G.M. Nazeruddin %A M.S. Pandharpatte %A K.B. Mulani %T PEG-SO3H: A mild and efficient recyclable catalyst for the synthesis of coumarin derivatives %J Comptes Rendus. Chimie %D 2012 %P 91-95 %V 15 %N 1 %I Elsevier %R 10.1016/j.crci.2011.10.005 %G en %F CRCHIM_2012__15_1_91_0