“…As shown in figure 2, the research line Technical Issues is the one with more published works [2], [17], [18], [25], [27], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45] , [46], [47], [48], [49], [50], [51]. All the papers start by doing a detailed description of the VISIR system, including in some cases, the installation procedure.…”