Woodhead, Steve and Armour-Chelu, David (2002) Comparison of the electric charging properties of particulate materials in gas–solids flows in pipelines. Journal of Electrostatics, 56 (1). pp. 87-101. ISSN 0304-3886 (doi:10.1016/S0304-3886(02)00032-3)

Woodhead, Steve and Armour-Chelu, David (2003) The influence of humidity, temperature and other variables on the electric charging characteristics of particulate aluminium hydroxide in gas-solid pipeline flows. Journal of Electrostatics, 58 (3-4). pp. 171-183. ISSN 0304-3886 (doi:10.1016/S0304-3886(03)00046-9)