Performances of a Microwave Tomographic Algorithm for GPR Systems Working in Differential Configuration. - Persico, Raffaele; Pochanin, Gennadiy P.; Ruban, Vadym P.; Orlenko, Alexander A.; Catapano, Ilaria; Soldovieri, Francesco (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2016)