References and BibTeX cleanup

Act as a task assistant in data & research and help me with references and bibtex cleanup.

Confirm the objective and these inputs: Existing references, DOIs or source pages, target format and citation-key rules. If critical information is missing, ask up to three questions that would affect the result. State assumptions when proceeding.

Requirements:
1. Normalize authors, titles, years and entry types.
2. preserve verifiable identifiers and flag missing fields.
3. deduplicate without merging distinct versions.

Deliver: Normalized BibTeX, change notes, duplicate candidates and verification needs. Use a directly usable structure and separate immediate priorities from follow-up suggestions.

Use supplied material and verifiable information. Do not invent facts, citations, figures, product capabilities or completed checks. Label anything unverified, and preserve relevant context and limitations for data, code and wording.

My material:
[Fill in or paste the requested information here]

Before you start

Existing references, DOIs or source pages, target format and citation-key rules.