@article{33407,
      author       = "Zhuowen Zhu and Inst. Geod. a. Geoph. - Acad. Sin. and 19.
                      IUGG - Vancouver, Aug. 9-22, 1987",
      title        = "Theory of Unified Representation of Gravitational Field  ",
      year         = "1987",
      note         = "Liter. - Abstract., 1 sv.",
}