A. R.  Gholap, Venkatesan, K., Pasricha, R., Daniel, T., Lahoti, R. J., and Srinivasan, K. V., ?Copper- and ligand-free sonogashira reaction catalyzed by Pd(0) nanoparticles at ambient conditions under ultrasound irradiation?, Journal of Organic Chemistry, vol. 70, no. 12, pp. 4869-4872, 2005.