1. Coupling in predator-prey dynamics: Ratio-dependence,;R. Arditi;J. Theoret. Biol.,1989
2. Systems with Impulse Effect: Stability Theory and Applications,;D. D. Bainov;Ellis Horwood Limited,1989
3. Impulsive Differential Equations: Periodic Solutions and Applications,;D. D. Bainov;Longman Scientific and Technical,1993
4. Mutual interference between parasites or predators and its effect on searching efficiency,;J. R. Beddington;J. Animal Ecol.,1975
5. Über Abbildung von Mannigfaltigkeiten,;L. E. J. Brouwer;Math. Ann.,1911