“…The distribution of selected studies on the basis of type is shown in Figure 3 where 28% of selected studies are from reputed journals while remaining 72% studies are from No. Scientific Database Studies Total 1 IEEE [49], [36], [20], [13], [21], [25], [50], [11], [37], [22], [38], 22 [61], [51], [62], [52], [26], [27], [23], [24], [53], [54], [39] 2 ELSIVER [65], [15], [66], [59] 4…”