United States. Department of the Treasury. "Testimony of Deputy Assistant Secretary for Tax Policy Mark J. Mazur to the Subcommittee on Oversight and Subcommittee on Select Revenue Measures, U.S. House of Representatives," Press Releases of the United States Department of the Treasury (June 10, 2021). https://fraser.stlouisfed.org/title/6111/item/603939, accessed on August 6, 2024.