A boxy bulge in the Milky Way. Inversion of the stellar statistics   equation with 2MASS data
  Inverting the stellar statistics equation from 2MASS star counts, we obtain the 3D density distribution of the Galactic bulge as well as its luminosity function in the K-band. This results in a boxy bulge with axial ratios 1:0.5:0.4 and a major axis angle with respect to the Sun-galactic center of $20^\circ-35^\circ $. 
M. Lopez-Corredoira, A. Cabrera-Lavers, O. E. Gerhard