1. European Respiratory Society . Clinical exercise testing with reference to lung diseases: indications, standardization and interpretation strategies. ERS Task Force on Standardization of Clinical Exercise Testing . Eur Respir J1997; 10: 2662-2689 .
2.
2. Roca J , Whipp BJ , eds. European Respiratory Society monograph ó: clinical exercise testing. European Respiratory Society, 1997.
3.
3. ATS/ACCP . Statement on cardiopulmonary exercise testing . Am J Respir Crit Care Med2003; 167: 211-277 .
4.
4. Wasserman K , Hansen JE , Sue DY , Stringer W , Whipp BJ . Principles of exercise testing and interpretation, fourth edition. Lea & Febiger, 2004.
5.
5. Oga T , Nishimura K , Tsukino M , Hajiro T , Ikeda A , Izumi T . The effects of oxitropium bromide on exercise performance in patients with stable chronic obstructive pulmonary disease. A comparison of three different exercise tests . Am J Respir Crit Care Med2000; 161: 1897-1901 .
6.
6. Wolfel EE , Boland D , Adair O et al. Fixed submaximal workload test: superiority over maximal exercise testing in evaluating responses to medical therapy in chronic heart failure . Circulation1997; 96 (Suppl 1): 1-83 .
