?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Giorgetti&rft.aufirst=Alain&rft.au=Giorgetti%2C+Alain&rft.title=Specification+and+Validation+of+Algorithms+Generating+Planar+Lehman+Words&rft.date=June+2012&rft.genre=proceeding