Hypercomplex signals - A novel extension of the analytic signal to the multidimensional case
@Article{buelow01tsp,
  author = 	 {T. B{"u}low and G. Sommer},
  title = 	 {Hypercomplex signals - A novel extension of the analytic signal to the multidimensional case},
  journal = 	 {IEEE Transactions on Signal Processing},
  year = 	 2001,
  volume =	 49,
  number =	 11,
  pages =	 {2844-2852},
  }