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On the study of chemostat model with pulsed input in a polluted environment. Zhao, Zhong, Song, Xinyu (2007) Discrete Dynamics in Nature and Society
Optimal control of a waste water cleaning plant. Grigorieva, Ellina V., Khailov, Evgenii N. (2010) Electronic Journal of Differential Equations (EJDE) [electronic only]
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