St\"ackel-type dynamic model of the Galaxy based on maser kinematic data
  A dynamic model of the Galaxy is constructed based on kinematic data for
masers with trigonometric parallaxes. Maser data is used to compute the model
potential in the Galactic plane. The potential is then generalized to three
dimensions assuming the existence of a third quadratic integral of motion. The
resulting Galactic model potential is of St\"ackel's type. The corresponding
space density function is determined from Poisson's equation.
