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  1. 120121
    Article of journal
    Published in 2007
    Repositorio Universidad Nacional de Colombia

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  2. 120122
  3. 120123
  4. 120124
  5. 120125
    Article of journal
    Repositorio Universidad Nacional de Colombia

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  6. 120126
  7. 120127
  8. 120128
  9. 120129
  10. 120130
  11. 120131
  12. 120132
  13. 120133
  14. 120134
  15. 120135
  16. 120136
    Article of journal
    Published in 2009
    Repositorio Universidad Nacional de Colombia

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  17. 120137
  18. 120138
  19. 120139
  20. 120140