Prakash U, (2002) Chapter 6. Bronꠀchoscopy, Saunders
Pass HI, (2000) Chapter 24. The use of light for the early detection and treatment of lung cancer, Lippincott Williams & Wilkins
Takahashi H, (2003) A prospective evaluation of transbronchial ultraꠀsonography for assessment of depth of invaꠀsion in early bronchogenic squamous cell carcinoma,