Kazem, Hatem Karim, and Ibtisam Haider Musa. “Using the Time-Directed Benchmarking (TDBM) Technique to Evaluate the Performance Efficiency of Health Units”. Al-Ghary Journal of Economic and Administrative Sciences, vol. 18, no. 1, Mar. 2022, pp. 339-57, https://doi.org/10.36325/ghjec.v18i1.13973.