R. K. Yadav, “Ultrasound Guided Thoracic Paravertebral and Coeliac Plexus Block for Open Cholecystectomy in a Patient with Multiple Co-Morbidities : A Case Report”, Birat J. Health Sci., vol. 3, no. 2, pp. 508–510, Sep. 2018, doi: 10.3126/bjhs.v3i2.20973.