?url_ver=Z39.88-2004&rft_id=10.1109%2FNatPC.2011.6136424&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Ahmad&rft.au=Ahmad%2C+M.R.B.&rft.aufirst=M.R.B.&rft.date=2011&rft.title=Design%2C+analysis+and+fabrication+of+Electret-based+micro-electromechanical+systems+energy+harvester&rft.isbn=9781457718847&rft.genre=proceeding