These references are considered secondary sources. Their aim is to provide access to the primary literature – journal publications. They include citations and abstracts and links to the full-text. Some examples are:
Use this unique index to identify scholarly journal articles referenced by other researchers.
These specialized journals provide access current news, developments and trends in the field.
These sources provide the table of contents to numerous journal titles on a weekly basis. They are published in seven editions covering the life sciences, biology, chemistry, medicine, engineering, social sciences, and humanities. One example is:
