Adaptive constraint-filtering method and its application to GPS positioning. - Tsai-Hsin Chang; Li-Sheng Wang; Fan-Ren Chang (CDC, 2009)

A Solution to the Ill-Conditioned GPS Positioning Problem in an Urban Environment. - Tsai-Hsin Chang; Li-Sheng Wang; Fan-Ren Chang (IEEE Trans. Intell. Transp. Syst., 2009)