Upadhyaya, E. V., Srivastava, P., Upadhyaya, V. D., Gangopadhyay, A., Sharma, S., Gupta, D., & Hassan, Z. (2009). Double coin in esophagus at same location and same alignment - a rare occurrence: A case report. Cases Network Ltd.

Upadhyaya, Eti V., Punit Srivastava, Vijay D. Upadhyaya, AN Gangopadhyay, SP Sharma, DK Gupta, và Zaheer Hassan. Double Coin in Esophagus At Same Location and Same Alignment - a Rare Occurrence: A Case Report. Cases Network Ltd, 2009.

Upadhyaya, Eti V., et al. Double Coin in Esophagus At Same Location and Same Alignment - a Rare Occurrence: A Case Report. Cases Network Ltd, 2009.