%0 Journal Article %T TiO2 nanoparticles: an efficient heterogeneous catalystfor synthesis of bis(indolyl)methanes under solvent-free conditions %A Rahimizadeh, Mohammad %A , %A Eshghi, Hossein %A Pordel, Mehdi %A Gh. Rajabzadeh %J Monatshefte fur Chemie %@ 0026-9247 %D 2009