HASSARADDI, GEETHA S., et al. “COMPARISION OF ANALGESIC EFFICACY OF ROPIVACAINE VERSUS BUPIVACAINE IN ULTRASOUND GUIDED BILATERAL ERECTOR SPINAE BLOCK IN LAPAROSCOPIC CHOLECYSTECTOMY: RANDOMIZED CLINICAL TRIAL”. International Journal of Current Pharmaceutical Research, vol. 17, no. 4, July 2025, pp. 94-97, doi:10.22159/ijcpr.2025v17i4.7026.