Károly Farkas, member of MEDIANETS, published an article in the Acta Politechnica Hungarica journal’s recent issue (March 2015, Vol. 12, No. 2, pp. 123-139., IF: 0.471) with the title “Placement Optimization of Reference Sensors for Indoor Tracking”. In this article, a simulated annealing based method and its simulation based performance analysis are presented to find the optimal number and placement of reference sensors in a given area to be used for indoor positioning.