1. Allen, A A. 1957. Unusual indoor winter activity in an Adalia bipunctata L. (Col., Coccinellidae). Ent Mon Mag, 93, 168.
2. Bayford, E G. 1947. The ladybirds of Keighley. Naturalist, 1947, 156.
3. Chandler, T J. 1962. London's urban climate. Geographical Journal, 128, 279–302.
4. Conway, G R. 1958. Notes on a hibernating swarm of Adalia bipunctata L. at Kingston, Surrey. Entomologist, 91, 135–136.
5. Digby, P S B. 1955. Factors affecting the temperature excess of insects in sunshine. Jour exp Biol, 32, 279–298.