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Logo GS. GS Retail, Seoul. GS Retail. Web. 17 Mac 2016.

“History.” GS25. GS Retail, n.d. Web. 3 Mac 2016.

Ko, Dong-hwan. "Convenience Store on Evolution Path." The Korea Times. The Korea

Times, 22 Apr 2015. Web. 04 Mac 2016.

“Lunch Boxes: Popularity of Convenience Store Lunch Boxes Soars" BusinessKorea, 30 Nov 2015. Web. 05 Mac 2016.

Park, Eun-Jee. "GS25 to Launch Electronic Services." Korea JoongAng Daily, 19 Mac 2015. Web. 03 Mac 2016.

"Seven Eleven Vies With GS25 for No. 2 Spot." Hankyung.com. The Korea Economic Daily, 12 Okt 2012. Web. 03 Mac 2016.