Bing found the following results
Gresham's Law: Definition, Effects, and Examples - Investopedia
The Laws of Money and Meaning - Harvard Business Review
Gresham's law - Wikipedia
What is lawful money? How is it different from legal tender?
MONEY Definition & Meaning - Black's Law Dictionary
money laundering | Wex | US Law | LII / Legal Information Institute
Understanding Money: Its Properties, Types, and Uses - Investopedia
Oxford Legal Research Library: The Legal Concept of Money
The Importance of "Money" - Harvard Law Review