Luthi, P; Zuber, M; Ritter, M; Oechslin, E N; Jenni, R; Seifert, B; Baldesberger, S; Attenhofer Jost, C H (2008). Echocardiographic findings in former professional cyclists after long-term deconditioning of more than 30 years. European Journal of Echocardigraphy, 9(2):261-267.
Baldesberger, S; Bauersfeld, U; Candinas, R; Seifert, Burkhardt; Zuber, M; Ritter, M; Jenni, R; Oechslin, E N; Luthi, P; Scharf, C; Marti, B; Attenhofer Jost, C H (2008). Sinus node disease and arrhythmias in the long-term follow-up of former professional cyclists. European Heart Journal, 29(1):71-78.