@article{compref337,
   author = {Wackerbauer,R and Witt,A and Altmanspracher,H and Kurths,J and Scheingraber,H},
   year = {1994},
   title = {A Comparative Classification of Complexity Measures based on distiguishing partitions in phase space as well as structural v. dynamic elements},
   journal = {Chaos, Solitons and Fractals},
   volume = {4},
   pages = {133-173}
}

@article{compref23,
   author = {Atmanspacher,H and Kurths,J and Scheingraber,H and Wackerbauer,R and Witt,A},
   year = {1992},
   title = {Complexity and meaning in nonlinear dynamical systems},
   journal = {Open systems and Information Dynamics},
   volume = {1},
   pages = {269-289}
}