An Efficient Three-Component Synthesis of 3-(5-Alkyl/aryl-1,3,4-oxadiazol-2-yl)-3-hydroxy-1,3-dihydro-2H-indol-2-ones - Adib, Mehdi; Sheikhi, Ehsan; Kavoosi, Azadeh; Bijanzadeh, Hamid Reza (Synthesis, 2010)