M. Sofiana, J. Seiver Langelo, E. Supriyadi, A. Maulina, and R. Wahyuni, “Case Study of Digital-Based Service Innovation for Old Age Insurance (JHT) Claims by BPJS Employment (BPJAMSOSTEK) Pekalongan Branch Office Central Java”, ijjm, vol. 3, no. 1, pp. 1-16, Jan. 2022.