?url_ver=Z39.88-2004&rft_id=10.1080%2F00207217.2012.687190&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=I.&rft.au=Yohannes%2C+I.&rft.aulast=Yohannes&rft.pages=196-204&rft.issue=2&rft.issn=00207217&rft.atitle=A+four-colour+optical+detector+circuit&rft.title=International+Journal+of+Electronics&rft.date=2013&rft.volume=100&rft.genre=article