References

*

On leave from Institute for Mathematical Problems in Biology, Pushchino, Moscow region, 142292, Russia

Also with Institute for Theoretical and Experimental Biophysics, Pushchino, Moscow region, 142292, Russia

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This result can also be substantiated by numerical simulation and by accurate asymptotic analysis of the phenomenological ODE model; this however is beyond the scope of this communication and will be published elsewhere.

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