Optical study of a diffuse bipolar nanosecond pulsed dielectric barrier discharge with different dielectric thicknesses in airZ.J. Liu, W.C. Wang, S. Zhang, D.Z. Yang, L. Jia and L.Y. DaiEur. Phys. J. D, 66 12 (2012) 319DOI: https://doi.org/10.1140/epjd/e2012-30434-4