“The Spending Power,” in Federalism in America: an Encyclopedia (Joseph R. Marbach et al ed. 2006).

“https://www.amazon.com/Federalism-America-Encyclopedia-2-K-Z/dp/0313329494/ref=sr_1_1?s=books&ie=UTF8&qid=1546713134&sr=1-1&keywords=Federalism+in+America%3A++an+Encyclopedia”