Eclipse mapping of the stream and disk flickering components in V2051   Oph
  We report on the investigation of the spatial distribution of the flickering sources in the dwarf nova V2051 Oph with eclipse mapping techniques. Low-frequency flickering originates in the gas stream and is related to the mass transfer process, whereas high-frequency flickering arises in the accretion disk and is probably connected to magneto-hydrodynamic turbulence. 
R. Baptista and A. Bortoletto