"(...) in fact there is war in the world of lichens. Following a brief consideration of parasitism and other forms of symbiosis, this war will be illustrated under the headings of algal slaves, exploiters of two kingdoms, alien invaders, cosy niche seekers and take-over specialists."
Richardson, D.H.S. (1999) War in the world of lichens: parasitism and symbiosis as exemplified by lichens and lichenicolous fungi, Mycol. Res. 103(6): 641-650.
