"One-dimensional" Coherent States and Oscillation Effects in Metals in a   Magnetic Field
  The "one-dimensional" coherent states are applied to describe the Shubnikov - de Haas and the de Haas-van Alphen oscillation effects in metals, semimetals, and degenerate semiconductors. The oscillatory part of the electron density of states in a magnetic field is calculated. A substantial simplification of calculations is achieved. 
D.A.Contreras-Solorio, J.A.de la Cruz-Alcaz and S.T.Pavlov