WASET
    Clara Inés Pardo Martínez and  William H. Alfonso Piña,  Recycling in Bogotá: A SWOT Analysis of Three Associations to Evaluate the Integrating the Informal Sector into Solid Waste Management.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2015, vol. 102(6). 1793 - 1798
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10001255.