Mitsakis, Evangelos, Evangelia Chrysohoou, Josep M. S. Grau, Panagiotis Iordanopoulos, and Georgia Aifadopoulou. 2017. “The Sensor Location Problem: Methodological Approach and Application”. Transport 32 (2):113–119. https://doi.org/10.3846/16484142.2016.1258674.