Longhurst, J., Olowoporoku, A. O., Barnes, J., Chatterton, T., Hayes, E. T., & Irwin, J. G. (2011). Process efficiency and outcome effectiveness in the United Kingdom's local air quality management regime. International Journal of Sustainable Development and Planning, 6(3), 286-298. https://doi.org/10.2495/SDP-V6-N3-286-298