?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Pham%2C+Thanh+Huyen&rft.aulast=Pham&rft.aufirst=Thanh+Huyen&rft.title=Solving+reduction+problems+in+cover+lattice+based+decision+tables&rft.genre=proceeding