Jain, A. P., S. C. Shah, P. C. Shah, and K. R. Patel. “A Comparative Study of Open Versus Closed Method of Establishment of Pneumoperitoneum in Laparoscopic Surgery”. International Surgery Journal, vol. 6, no. 9, Aug. 2019, pp. 3335-40, doi:10.18203/2349-2902.isj20194075.