Sauerwein, H., Gleixner, A., Meyer, H., Schänzer, W., Geyer, H., Gotzmann, A., & Marek-Engelke, U. (1998). Clenbuterol: Longterm detection via hair analysis. Recent advances in doping analysis (5) : Proceedings of the Manfred Donike Workshop ; 15th Cologne Workshop on Dope Analysis ; 23rd to 28th February 1997, 1998. S. 27-40, Lit..

Sauerwein, H., A. Gleixner, H.H.D Meyer, Wilhelm Schänzer, Hans Geyer, Andrea Gotzmann, and U. Marek-Engelke. "Clenbuterol: Longterm Detection Via Hair Analysis." Recent Advances in Doping Analysis (5) : Proceedings of the Manfred Donike Workshop ; 15th Cologne Workshop On Dope Analysis ; 23rd to 28th February 1997 1998: 1998. S. 27-40, Lit..

Sauerwein, H., et al. "Clenbuterol: Longterm Detection Via Hair Analysis." Recent Advances in Doping Analysis (5) : Proceedings of the Manfred Donike Workshop ; 15th Cologne Workshop On Dope Analysis ; 23rd to 28th February 1997 1998: 1998. S. 27-40, Lit..