Purwaningsih, R.; Putri, A. A. A.; Ryandy, M. S.; Arvianto, A.; Hapsari, C. A. P.; Dzulfikar, R. D. Assessing Readiness Index Toward Industry 4.0 of SMEs Leather Industry in Yogyakarta’s. MIX 2026, 16, 255-273.