1. The Pocket Oxford Dictionary of Current English;Fowler,1977
2. Biodiversity and unity in biochemistry;Thauer;Antonie van Leeuwenhoek,1997
3. Seven Clues to the Origin of Life;Carins-Smith,1990
4. The Mystery of Life's Origin;Thaxton,1984
5. Mineral theories of the origin of life and an iron sulphide example;Cairns-Smith;Origins Life Evol. Biosphere,1992