Chayut Kongban และ Poom Kumam. (2013) On best proximity point theorems in metric spaces. King Mongkut’s University of Technology Thonburi:ม.ป.ท.Chayut Kongban และ Poom Kumam. 2013. On best proximity point theorems in metric spaces. ม.ป.ท.:King Mongkut’s University of Technology Thonburi;Chayut Kongban และ Poom Kumam. On best proximity point theorems in metric spaces. ม.ป.ท.:King Mongkut’s University of Technology Thonburi, 2013. Print.