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• [1] P.Erdös, Problem 3740, Amer.Math.Monthly, 42(1935), 396.
• [2] L.J.Mordell, Egy geometriai, probléma megoldása(Solution of a geometrical problem), Középiskolai Matematikaiés Fizikai Lapok 11(1935), 145-146.
• [3] L.J.Mordell and D.F.Barrow, Solution of Problem 3740, Amer.Math.Monthly, 44(1937), 252- 254.
• [4] G.R.Veldkamp, The Erdös-Mordell Inequality, Nieuw Tijdschr.Wisk, 45(1957/1958),193-196.
• [5] V.Komornik, A short proof of the Erdös-Mordell theorem, Amer.Math.Monthly, 104(1997), 57-60.
• [6] D.K.Kazarinoff, A simple proof of the Erdös-Mordell inequality for triangles, Michigan Math- ematical Journal, 4(1957), 97-98.
• [7] L.Bankoff, An elementary proof of the Erdös-Mordell theorem, Amer.Math.Monthly, 65(1958), 521.
• [8] A.Avez, A short proof of the Erdös and Mordell theorem, Amer.Math.Monthly, 100(1993), 60-62.
• [9] H.Lee, Another proof of the Erdös-Mordell theorem, Forum Geom, 1(2001), 7-8.
• [10] N.Dergiades, Signed distances and the Erdös-Mordell inequality, Forum Geom, 4(2004), 67- 68.
• [11] C.Alsina, R.B.Nelsen, A visual proof of the Erdös-Mordell inequality, Forum Geom, 7(2001), 99-102.
• [12] J.Liu, A sharpening of the Erdös-Mordell and its applications, Journal of Chongqing Normal University (Natural Science Edition), 22(2)(2005), 12-14(in Chinese).
• [13] J.Liu, Several new inequalities for the triangle, Mathematics Competition, Hunan Education Press.Hunan, 15(1992), 80-100(in Chinese).
• [14] Z.Wang, Proof of a geometric inequality, Commun. Stud. Inequal. 16(1)(2009), 66-68(in Chi- nese).
• [15] D.S.Mitrinović J.E.Pečarić and V.Volenec, Recent Advances in Geometric Inequalities, Kluwer Acad. Publ., Dordrecht 1989.
• [16] J.Liu, Applications of a corollary of the Wolstenholme inequality, Journal of luoyang teachers college, 22(5)(2003), 11-13(in Chinese).