@article{CTT100773685,
  author = {Mahmoud Heshmat and Kazuhide Nakata and Amr Eltawil},
  title = {Solving the patient appointment scheduling problem in outpatient chemotherapy clinics using clustering and mathematical programming},
  journal = {Computers & Industrial Engineering},
  year = 2018,
}

@inproceedings{CTT100773688,
  author = {Mahmoud Heshmat and Kazuhide Nakata and Amr Eltawil},
  title = {Modified Formulation for the Appointment Scheduling Problem of Outpatient Chemotherapy Departments},
  booktitle = {Proceedings of the 4th International Conference on industrial Engineering and Applications},
  year = 2019,
}