Investigations on charging estimation of water droplet on composite insulating surface in an electric fieldJean Ndoumbe, Abderrhamane Beroual and Adolphe Moukengue ImanoEur. Phys. J. Appl. Phys., 69 3 (2015) 31301DOI: https://doi.org/10.1051/epjap/2015140403