Butt, T.E., Clark, M., Umeadi, B.B.N. and Coulon, F. (2012) Risk assessment - Encapsulation of both the built and natural environments. Environmental Technology, 33 (2). pp. 183-190. ISSN 0959-3330 (Print), 1479-487X (Online) (doi:https://doi.org/10.1080/09593330.2011.556147)

Butt, T.E., Clark, M., Coulon, F. and Oduyemi, K.O.K. (2009) A review of literature and computer models on exposure assessment. Environmental Technology, 30 (14). pp. 1487-1501. ISSN 0959-3330 (Print), 1479-487X (Online) (doi:https://doi.org/10.1080/09593330903345952)