@article{article, title = {{On the valuation of 鈥榚xternal effects鈥� in project appraisal}}, publisher = {{Informa UK Limited}}, url = {{}}, year = {{1989}}, month = {{1}}, author = {{Cook P and Mosley P}}, doi = {{10.1080/02688867.1989.9726724}}, volume = {{4}}, journal = {{Project Appraisal}}, issue = {{3}}, pages = {{143-150}}, note = {{Accessed on 2025/05/24}}}