1. A probabilistic synthesis of precursory phenomena;Aki,1981
2. On the behavior of coupled dynamos;Allan,1962
3. Broken coal;Bennett;J. Inst. Fuel,1936
4. Dynamical systems and models for reversals of the earth's magnetic field;Chillingworth;Math. Geol.,1980
5. The Rikitake two-disc dynamo system;Cook,1970