The restricted access contents (EDS, Databases and e-Books) are only available to registered users.
If you are on an external network (at home, eduroam, etc.), you'll have to use a VPN network and have a valid user account.
Catalogue ULisboa
Repository ULisboa
EDS - Ebsco Discovery Service
Databases
e-Books
Information available at https://ciencias.ulisboa.pt/en/e-books.