“A Control Model in Ecology for the Survival of Resource-Based Industries When Its Resource Is Depleted by Toxicants Pollutants and Augmented Precursors: A Qualitative Approach”. 2008. Journal of International Academy of Physical Sciences 12 (1-4): 55-73. http://www.iaps.org.in/journal/index.php/journaliaps/article/view/841.