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		| Agustín I. Cabrera-llanos | 
	
		| Unidad Profesional Interdisciplinaria de Biotecnología, Instituto Politécnico Nacional (UPIBI-IPN) | 
	
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		| Mexico | 
	
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		| aicllbuda@yahoo.com | 
	
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		| JEL Areas: C6 : Mathematical Methods and Programming: General
 C : Mathematical and Quantitative Methods
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