@Article{,
author = "Alex Varshavsky and Eyal de Lara and Jeffrey Hightower and Anthony LaMarca and Veljo Otsason ",
title = "GSM Indoor Localization",
publisher = "Elsevier",
journal = "Pervasive and Mobile Computing Journal (PMC)",
volume = "3",
number = "6",
month = "December",
year = "2007",
pages = "698-720",
}