1. Pteridium aquilinum on limestone;Allen;British Fern Gazelle,1968
2. La mycotrophic chez les pteridopliytes. Sa frequence, ses characteres, sa signification;Boullard;Le Bolaniste,1957
3. A fern collecting expedition to Crete;Brownsey;British Fern Gazelle,1973
4. Recent studies on the potential for biological control of bracken using fungi;Burge;Proceedings of the Royal Society of Edinburgh,1985