*David G. Boyers and William A. Tiller (1973). "Corona discharge photography". Journal of Applied Physics 44: 3102–3112. doi:10.1063/1.1662715. | *David G. Boyers and William A. Tiller (1973). "Corona discharge photography". Journal of Applied Physics 44: 3102–3112. doi:10.1063/1.1662715. |