Each source references other related sources, creating a network that can be followed forward or backward in time to find additional relevant information. Useful information like keywords, subject terms, related documents, and authors from a known source can also be leveraged to discover other related sources. This document discusses how existing sources can be used to find new sources by following citation links between documents and utilizing metadata like titles and authors.

1. LEVERAGING EXISTING
SOURCES

2. Each source is linked to other sources through
their lists of references (citations):
z Databases
that track who
references
whom are
called “citation
indexes”
MY
SOURCE
Ref 3
Ref 2
Ref 1
OLDER SOURCESNEWER SOURCES
• You can follow these links forward in time (with citation indexes) or backward in
time (using the publication’s list of references) to find related sources.

3. Other useful information from a known source:
Key words
in Abstract,
Title
Subject Terms/
Controlled
Vocabulary
Related
Documents
Authors
• You can also use all of this info to find related sources

4. v
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