@article{art306,
  title = {Use of Tumor Marker and Enzymes in Recurrence and Monitoring Response to Pre and Post Chemotherapy for Patients with Upper Gastrointestinal Carcinoma},
  doi = {10.23958/ijirms/vol02-i08/12},
  url = {https://ijirms.in/index.php/ijecs/article/view/306}
}