https://documentation.ubuntu.com/launchpad/user/explanation/feature-highlights/the-bug-tracker/
The Launchpad bug tracker - Launchpad manual
Extended highlight of the Launchpad's bug tracker.
launchpad bug trackermanual
https://launchpad.net/+tour/bugs
Bug tracker for open source and other software projects — Launchpad tour
Canonical Launchpad Tour - Sharing code means sharing bugs: issues found in free software may originate in code upstream or downstream in a distribution’s...
for open sourcebug trackerother software
https://documentation.ubuntu.com/launchpad/user/reference/bug-tracker-api/plugin-api/
Bug tracker API plugin - Launchpad manual
Launchpad bug tracker API plugin reference.
bug trackerapipluginlaunchpadmanual