On the Extension of the Erdos-Mordell Type Inequalities
  We discuss the extension of inequality R_A >= c/a * r_b + b/a * r_c to the plane of triangle ABC. Based on the obtained extension, in regard to all three vertices of the triangle, we get the extension of Erdos-Mordell inequality, and some inequalities of Erdos-Mordell type. 
Branko Malesevic, Maja Petrovic, Marija Obradovic, Branislav   Popkonstantinovic
math.MG