References 102 and 103 are:
102. Yungwirth CJ, Wadley HNG, O’Connor JH, Zakraysek AJ and Deshpande VS. Impact response of sandwich plates with a pyramidal lattice core. International Journal of Impact Engineering, 2008; 35(8): 920–936.
103. Yungwirth CJ, Radford DD, Aronson M and Wadley HNG. Experimental assessment of the ballistic response of composite pyramidal lattice truss structures. Composites Part B: engineering, 2007; 39(3): 556–569.
From the same paper as the previous 6 images.
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