M. Mohan Raja, V. Vijayakumar, J. J. Nieto, S. K. Panda, A. Shukla, and K. S. Nisar, “An analysis on the approximate controllability results for Caputo fractional hemivariational inequalities of order 1 < r < 2 using sectorial operators”, NAMC, vol. 28, no. 6, pp. 1037–1061, Oct. 2023, doi: 10.15388/namc.2023.28.33429.