%0 Journal Article %A Seyed Meysam Baghbanian %A Yaser Babajani %A Hamed Tashakorian %A Samad Khaksar %A Maryam Farhang %T p-sulfonic acid calix[4]arene: An efficient reusable organocatalyst for the synthesis of bis(indolyl)methanes derivatives in water and under solvent-free conditions %J Comptes Rendus. Chimie %D 2013 %P 129-134 %V 16 %N 2 %I Elsevier %R 10.1016/j.crci.2012.10.014 %G en %F CRCHIM_2013__16_2_129_0