Zaman M, Singal S, Singal R, Shah A, Sandhu KS, Singh B, Khera A, Bassi S.
Comparison of Open and Closed Entry Techniques for Creation of Pneumoperitoneum in Laparoscopic Surgery in Terms of Time Consumption, Entry-related Complications and Failure of Technique. 
World J Lap Surg
2015;
8
(3):69-71.