@Article{ liberzon00spectral,
  author = 	 {Daniel Liberzon and Roger Brockett},
  title = 	 {Spectral Analysis  of Fokker-Planck and Related Operators Arising from Linear Stochastic Differential Equations},
  journal = 	 {SIAM Journal on Control and Optimization},
  year = 	 {2000},
  volume = 	 {38},
  number = 	 {5},
  pages = 	 {1453--1467},
  month = 	 {May},
}