Downloading the files is 10% of the battle. Here is what trips up 90% of new users.
To ensure you have the latest stable version and the most secure code, you should always source your NagVis files from official channels. nagvis download
When searching, use keywords like "network visualization," "monitoring tools," "NagVis," "network management," and "IT infrastructure monitoring" to find relevant papers. Downloading the files is 10% of the battle