J. J. Lowke, “A Theory of Ball Lightning as an Electrical Discharge,” Journal of Physics D: Applied Physics, 29 (1996), 1237-1244. Available from: http://www.australiasevereweather.com/storm_news/2000/docs/0006-02.htm. More recently from Phys.Org, 12 Oct. 2012: http://phys.org/news/2012-10-mystery-ball-lightning.html#nRlv. Additional BL theories from: http://www.scientificamerican.com/article.cfm?id=periodically-i-hear-stori