The monogenic signal
@Article{felsberg01ieeetsp,
  author = 	 {M. Felsberg and G. Sommer},
  title = 	 {The monogenic signal},
  journal = 	 {IEEE Transactions on Signal Processing},
  year = 	 2001,
  volume =	 49,
  number =	 12,
  pages =        {3136-3144},
  month =	 {December},
  }