Summary of recommendations for high-precision radiotherapy in lung cancer (Radiother Oncol. 2004 May;71(2):139-46)
Dahanca, EORTC, Gortec, NCIC and RTOG endorsed consensus guidelines for the delineation of the CTV in the N0 neck of patients with Head & Neck Squamous cell carcinoma:

CT-based delineation of organs at risk in the head and neck region: DAHANCA, EORTC, GORTEC, HKNPCSG, NCIC CTG, NCRI, NRG Oncology and TROG consensus guidelines (Atlas)

Definition and delineation of the clinical target volume for rectal cancer (Int J Radiat Oncol Biol Phys. 2006 Jul 15;65(4):1129-42)

Guidelines for primary radiotherapy of patients with prostate cancer (Radiother Oncol. 2006 Jun;79(3):259-69)

Guidelines for target volume definition in post-operative radiotherapy for prostate cancer, on behalf of the EORTC Radiation Oncology Group (Radiother Oncol. 2007 Aug;84(2):121-7)