http://elea.unisa.it/handle/10556/2637
(Università degli Studi di Salerno – Biblioteca di Ateneo)
https://doaj.org/toc/2280-6849
(DOAJ – Directory of Open Access Journals)
www.torontopubliclibrary.ca/detail.jsp?Entt=RDM3544691&R=3544691
(Toronto Public Library)
www.archive-it.org/organizations/304?q=Sinestesieonline&page=1&show=Sites
(Columbia University Libraries)
acnp.unibo.it/cgi-ser/start/it/cnr/df-p.itcl?catno=2442140&person=false&libr=%7B%7D
(ANCP)
scholar.google.it/scholar?hl=it&q=Sinestesieonline&btnG=&lr=
(Google Scholar)