git-branch(1) Manual Page, Git Project, 2024 - Official documentation for the git branch command, describing its use for creating, listing, and deleting branches, including the -d and -D options.
Pro Git, Scott Chacon and Ben Straub, 2014 (Apress) - A widely respected book on Git, offering in-depth explanations of Git's branching model and common operations, such as local branch deletion.
Deleting a Branch, Atlassian, 2024 (Atlassian) - A practical guide explaining the process of deleting local and remote Git branches, suitable for understanding common workflows.