Nonlinear analysis of continuous ECG during sleep I. Reconstruction. - Jürgen Fell; K. Mann; Joachim Röschke; M. S. Gopinathan (Biol. Cybern., 2000)

Nonlinear analysis of continuous ECG during sleep II. Dynamical measures. - Jürgen Fell; K. Mann; Joachim Röschke; M. S. Gopinathan (Biol. Cybern., 2000)