Indexing

Specialized Indexes and Bibliographic Databases (BBCS)
(Bibliographic databases with a scientific selection committee)

National or Regional Bibliographic Databases (BBN / IBN)
(Institutional recognition, defined geographic scope)

Specialized Indexes and Databases (IBC/IB)
(Enable bibliometric and citation analysis)

Google

Bibliographic Repositories and Catalogs
(Do not evaluate scientific quality)

Digital Preservation Systems

Bibliometric Analysis Platforms