C. T. R. Wilson (1924) "The electric field of a thundercloud and some of its effects," Proceedings of the Physical Society of London, 37 (1) : 32D-37D. University of São PauloАрхивирано на сајту Wayback Machine (10. март 2014).
C. T. R. Wilson (1924) "The electric field of a thundercloud and some of its effects," Proceedings of the Physical Society of London, 37 (1) : 32D-37D. University of São PauloАрхивирано на сајту Wayback Machine (10. март 2014).