Yves Meyer

Nonlinear dynamics of heart rate and oxygen uptake in exhaustive 10,000 m runs: influence of constant vs. freely paced.

V. Billat, J. Koralsztein, E. Wesfreid, 2006, The journal of physiological sciences : JPS.

Detection of changes in the fractal scaling of heart rate and speed in a marathon race

Eva Wesfreid, Véronique Billat, L. Mille-Hamard, 2009 .