Cite

    Bernhard Dauser et al.. “Clinical experience with a simple retraction device in single-port laparoscopic cholecystectomy: Technical description and initial results.” Minimally invasive therapy & allied technologies, vol. 23, no. 3, 2014, pp. 152–156. http://access.bl.uk/ark:/81055/vdc_100024835269.0x00005f