1. Kulak, D., & Guiney, E. (2012). Use Cases: Requirements in Context (2nd ed.). Addison-Wesley Professional. Chapter 2, "Use Cases in the Requirements Workflow," explicitly places use case modeling within the requirements definition process.
2. Wiegers, K., & Beatty, J. (2013). Software Requirements (3rd ed.). Microsoft Press. Chapter 8, "Understanding User Requirements," identifies use cases as a primary tool for business analysts to elicit and document user requirements.
3. Davidson, E. J. (1999). Joint application design (JAD) in practice. Journal of Systems and Software, 45(3), 215-223. This paper discusses JAD as a group-based method for requirements definition where modeling techniques, such as use cases, are employed to facilitate discussion and specification (Section 2.1, "The JAD Method"). https://doi.org/10.1016/S0164-1212(98)10080-8