Comments on "Anomalous-Filling-Factor-Dependent Nuclear Spin   Polarization in a 2D Electron System: Quantum Hall Effect" by J.H.Smet, K.   von Klitzing et al, Phys. Rev. Lett. 92, 086802(2004)
  We find that the nuclear-spin polarization has not been treated correctly. The references given are those of wrong papers. The credits assigned for discoveries are also not correct. Incorrect theories have been cited. The reference to the correct theory has been neglected. Because there are lots of good people, so they do not want to give reference to my papers even though they have not solved the problem of quantum Hall effect and we have. 
Keshav N. Shrivastava