1. Bowker, G. E., & Crenshaw, H. C. (2003). The influence of fair weather electricity on the charging of wind-dispersed pollen. Proceedings of 12th international conference on atmospheric electricity, 9–13 June 2003, Versailles, France, Vol. I, 361–364.
2. Bowker, G. E., & Crenshaw, H. C. (2007). Electrostatic forces in wind-pollination–part 1: Measurement of the electrostatic charge on pollen. Atmospheric Environment, 41(8), 1587–1595.
3. Buchwald, N. F. (1938). Om Sporenproduktiones storrelse hos Tøndersvampen Polyporus fomentarius (L.) Fr. Friesia, 2(1), 42–69. (Cited after Votintseva 2005).
4. Buller, A. H. R. (1909). Researches on fungi (Vol. 1). London: Longmans.
5. Chalmers, J. A. (1967). Atmospheric electricity (2nd ed.). Oxford: Pergamon Press.