?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Nguyen%2C+Duy+Khuong&rft.aulast=Nguyen&rft.aufirst=Duy+Khuong&rft.date=November+2013&rft.title=Siplicial+Nonnegative+Matrix+Factorization&rft.genre=proceeding