Claghorn, J., & Werthmann, C. (2015). Non-formal Growth and Landslide Risk: The research project "Rehabitar la montana" seeks for strategies to improve non-formal settlements on the steep slopes of the Aburrá valley on the fringes of the Colombian metropolis Medellin. Topos.

Claghorn, Joseph, und Christian Werthmann. "Non-formal Growth and Landslide Risk: The Research Project "Rehabitar La Montana" Seeks for Strategies to Improve Non-formal Settlements on the Steep Slopes of the Aburrá Valley on the Fringes of the Colombian Metropolis Medellin." Topos 2015.

Claghorn, Joseph, und Christian Werthmann. "Non-formal Growth and Landslide Risk: The Research Project "Rehabitar La Montana" Seeks for Strategies to Improve Non-formal Settlements on the Steep Slopes of the Aburrá Valley on the Fringes of the Colombian Metropolis Medellin." Topos, 2015.