SANDEEP KUMAR PENCHALA. “ENTERPRISE-GRADE MOBILE PUSH-TO-TALK SYSTEMS FOR EMERGENCY SERVICES: ARCHITECTURAL FRAMEWORKS, SECURITY PARADIGMS, AND PERFORMANCE OPTIMIZATION”. TPM – Testing, Psychometrics, Methodology in Applied Psychology, vol. 32, no. S9, Dec. 2025, pp. 2408-23, doi:10.5281/zenodo.18043541.