He was a Humboldt research fellow at Ludwig Maximilian University of Munich, Germany (1989 and 1995), a visiting fellow at the University of Rome-La Sapienza (1995), and a visiting scholar at the Columbia Law School in New York (2000 and 2009).
Santo Domingo | Rafael Nadal | San Rafael, California | Rafael Hernández Colón | Rafael Viñoly | San Rafael | Rafael Trujillo | Rafael Moneo | Universidad Autónoma de Santo Domingo | Rafael Osuna | Rafael Benítez | Jorge Rafael Videla | Rafael Sabatini | Rafael Correa | Rafael Cordero Santiago | Rafael Alberti | San Rafael, Mendoza | San Rafael, Bulacan | Rafael Squirru | Rafael Lozano-Hemmer | Rafael Escalona | Rafael | Eugene Domingo | Domingo Faustino Sarmiento | Santo Domingo (Ecuador) | Rafael Sperafico | Rafael Solano | Rafael Ruelas | Rafael Rosell | Rafael Morales |