1. ISTQB® Certified Tester Foundation Level Syllabus (2018, Version 3.1), Section 3.2.1, "Work Product Review Process," outlines the objectives of reviews. While not using the word "enforce," the objective of "improving the quality of the software work product" inherently includes ensuring it meets quality standards. More explicitly, review checklists are based on these standards.
2. ISTQB® Certified Tester Advanced Level Test Analyst Syllabus (2019, Version 3.0), Section 2.2.2, "Using Checklists in Reviews," states: "Typical checklist items include checks against common defect types and adherence to standards (e.g., coding standards, modeling standards)." This directly confirms that reviews check for and thus help enforce standards.
3. Sommerville, I. (2016). Software Engineering (10th ed.). Pearson. In Chapter 8, "Software Testing," Section 8.3.1, "Program inspections," the author lists the principal checks made during the inspection process. The second item on the list is: "Compliance with standards is checked (e.g., are comments in the right format?)."
4. Pressman, R. S., & Maxim, B. R. (2020). Software Engineering: A Practitioner's Approach (9th ed.). McGraw-Hill. In Chapter 19, "Software Quality Assurance," Section 19.3, "Formal Technical Reviews," the authors state that a key objective of a review is "to verify that the software element under review conforms to its specification and that it adheres to predefined standards."