Ehsan Zandi Rudolf Mathar RSS-based Positioning of Multiple Co-Channel Targets with Unknown Transmit Power in a Log-Normal Shadowing Scenario. 113-118 2018 WiSEE https://doi.org/10.1109/WiSEE.2018.8637315 conf/wisee/2018 db/conf/wisee/wisee2018.html#ZandiM18