Masud, Mehedi, and M. A. Hossain. “Dynamic Query Plan for Efficient Query Processing in Peer-to-Peer Environments”. INFOCOMP Journal of Computer Science, vol. 7, no. 3, Sept. 2008, pp. 1-6, https://infocomp.dcc.ufla.br/index.php/infocomp/article/view/223.