Walter Hellerstein, a Distinguished Research Professor and Shackelford Distinguished Professor in Taxation Law Emeritus, has seen his treatise "State Taxation" referenced by the Illinois First District Appellate Court. The citation appeared in the case of Pepsico, Inc. v. Illinois Department of Revenue on March 19, 2025.
Hellerstein's treatise is recognized as a notable work in the field of taxation law. His expertise continues to be acknowledged through its use in important legal cases such as this one.