C Braun

Receiver operating characteristics of perceptrons: influence of sample size and prevalence.

W Kinzel, W. Kinzel, A. Freking, 1999, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

Demonstration of nonlinear components in heart rate variability of healthy persons.

A. Freking, C. Braun, P. Kowallik, 1998, The American journal of physiology.