Tomás Ruiz-López José Luis Garrido Kawtar Benghazi Akhlaki Lawrence Chung A Survey on Indoor Positioning Systems: Foreseeing a Quality Design. 373-380 2010 DCAI http://dx.doi.org/10.1007/978-3-642-14883-5_48 conf/dcai/2010 db/conf/dcai/dcai2010.html#Ruiz-LopezGAC10