By Trustees of the Natural Beekeeping Trust
Bees in Winter (page 26-27) by Heidi Herrmann (Star and Furrow 114)
Man and Bee – the Importance of Swarming by Heidi Herrmann (Star and Furrow 113)
Heater Bees by Heidi Herrmann, (BBKA News August 2010)
By others
Wintering beehives by James E Tew, BeeCulture, September 2009
We face a world without birds because of our over-reliance on pesticides, writes Kate Ravilious in The Independent, 15 November 2010