After his defense, Vasil undertook a post-doctoral specialisations in “Social anthropology” at the School for Advanced Studies in the Social Sciences (French: École des hautes études en sciences sociales; also known as EHESS) in 1993, in the “Socio-Anthropological Methods in Social Sciences” at the Institute of Sociology with the Bulgarian Academy of Science (1994), and “New Information Technologies in Social Sciences” in French National Centre for Scientific Research (French: Centre national de la recherche scientifique, CNRS) (1996).