J. Buceta Miller, “Assessing the Quality of the Beaches, Civil Engineering,” No. 128, 2002, pp. 145-154.
 M. C. B. De Araujo and M. F. Costa, “Municipal Services on Tourist Beaches: Costs and Benefits of Solid Waste Collection,” Journal of Coastal Research, Vol. 22, No. 5, 2006, pp. 1070-1075.
 J. S. Silva, S. C. T. Barbosa and M. F. Costa, “Flag Items as a Tool for Monitoring Solid Wastes from Users on Urban Beaches,” Journal of Coastal Research, Vol. 24, No. 4, 2008, pp. 890-898.
 C. M. Botero and L. C. Garcia, “Quantification and Classification of Solid Waste in Tourist Beaches. Evaluation on Three Beaches of Santa Marta, Colombia,” 2011.
 S. Botero and R. L. Diaz, “The Beach and Coastal Area Particularly in Integrated Coastal Management, from the Literature Review,” 2009.
 G. Hurtado and S. C. Botero, “Selection and Parameters Proposed for the Determination of Environmental Quality in the Colombian Caribbean Tourist Beaches,” 2009.
 Ocean Conservancy, International Coastal Cleanup.