1. Cryptostroma corticale and sooty bark disease of sycamore;Gregory;Transactions of the British Mycological Society,1951
2. The grey squirrel;Middleton,1931
3. How far has Cryptostroma corticale spread in Britain?;Paviour-Smith;Bulletin of the British Mycological Society,1976
4. Sooty bark disease of sycamore: an accident or an emergency ?;Pawsey;Gardeners' Chronicle,1973
5. Sooty bark disease of sycamore-a disease in eclipse;Peace;Quarterly Journal of Forestry,1955