?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Singhal%2C+P.K.&rft.aulast=Singhal&rft.aufirst=P.K.&rft.issue=4&rft.volume=3&rft.issn=15167399&rft.atitle=Theoretical+investigations+on+elliptical+refocusing+of+rotmantype+lens+for+multiple+beamforming&rft.pages=111-128&rft.title=Journal+of+Microwaves+and+Optoelectronics&rft.date=2004&rft.genre=article