39K and 87Rb Nuclear Magnetic Resonance in the Pyrochlore   Superconductors AOs2O6 (A=K, Rb)
  This paper has been withdrawn by the authors, since a crucial assumption in the analysis of the data was found to be incorrect from the later experiments. 
K. Arai, J. Kikuchi, K. Kodama, M. Takigawa, S. Yonezawa, Y. Muraoka,   and Z. Hiroi