?url_ver=Z39.88-2004&rft_id=10.4028%2Fwww.scientific.net%2FAMM.229-231.2399&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Yong%2C+L.C.&rft.aulast=Yong&rft.aufirst=L.C.&rft.volume=229-23&rft.issn=16609336&rft.isbn=9783037855102&rft.atitle=Ladder+logic+diagram+development+for+programmable+logic+controllers+via+S-method&rft.pages=2399-2403&rft.title=Applied+Mechanics+and+Materials&rft.date=2012&rft.genre=article