Sgambatti, J. and Villegas, B. “Compaction columns field test in heterogeneous soil profile”. Report for Intevep. Caracas. Venezuela. 1991.
Villegas, B. “Soil improvement by stone columns”. Congress for Geotechnical Youth of Europe. The Hague. Holland. 1989.
Abi-Saab, J. and Parra, S. and Villegas, B. “Historical evolution of geotechnical studies in the dykes of the Eastern Coast of Maracaibo Lake”. X Seminario Venezolano de Geotecnia. Caracas. Venezuela. 1988.
Fabius, M., Tozer S. and Villegas, B.  2006.  A Shoreline Case Study: 20 Years of Hazard Management and an Innovative Soil Nailed Slope Solution.  Chicago Geotechnical Lecture Series, University of Illinois.
Fabius, M. and Villegas, B.  2007.  Integrating Risk Management with Slope Remediation: Applying Soil Nail and Root Technology to the Cautionary Zone Approach (CZA).  1st North American Landslide Conference.  Vail, Colorado.