Propagation of electrical tree structures in solid polymeric insulation [comment and reply]

For original paper see L.A. Dissado et al., ibid., vol.4, pp.259-79, 1997. The authors of the original paper presented a review of two theoretical approaches to electrical tree propagation and pointed out the significance of space charge and its spatial arrangement in the formation and propagation of treeing structures. This comment raises some questions and presents some observations on the original paper. A reply by the original authors is included.