“EXISTENCE OF MILD SOLUTION FOR $(k, \Psi)$-HILFER FRACTIONAL CAUCHY VALUE PROBLEM OF SOBOLEV TYPE”. Advances in Differential Equations and Control Processes 31, no. 4 (August 9, 2024): 439–472. Accessed January 5, 2026. https://pphmjopenaccess.com/adecp/article/view/2050.