Di seguito alcuni collegamenti a risorse ulteriori
http://www.isem.cnr.it/
https://scholar.google.it/citations?user=mWK2-qsAAAAJ&hl=it
http://www.treccani.it/enciclopedia/nicla-vassallo/
http://unige-it.academia.edu/NiclaVassallo
https://www.youtube.com/results?search_query=%22Nicla+Vassallo%22
https://en.wikipedia.org/wiki/Nicla_Vassallo