1. Über die lage der integralkurven gewönlicher differantialgleichungen;Nagumo;Proc. Phys. Math. Soc. Jpn.,1942
2. Theory and Application of Hopf Bifurcation, London Mathematical Society Lecture Note Series;Hassard,1981
3. Stability and optimal harvesting of a prey-predator model with stage structure for predator;Kar;Appl. Math.,2005
4. A stage-structured prey-predator model with discrete time delay;Bandyopadhyay;Appl. Math. Comput.,2006
5. A new stage structured predator-prey Gomportz model with time delay and impulsive perturbations on the prey;Liu;Appl. Math. Comput.,2008