In the Wiki article about the Vaidya metric : http://en.wikipedia.org/wiki/Vaidya_metric there is mention of a "further generalisation" called the Kinnersley metric, without giving any details or even a reference. Is this a generalisation of the Vaidya metric to include angular momentum ( i.e. a radiating Kerr or Kerr-Newman solution ), or is it something different ? Does anyone have a link to the specific form of the Kinnersley metric ? I am really just curious, and somewhat disappointed about the poor quality of this particular Wiki page, and its lack of referenced sources.