4 Jul
2021
4 Jul
'21
8:52 p.m.
https://www.wired.com/story/how-underground-fiber-optics-spy-on-humans-movin...
https://www.timesofisrael.com/how-the-tunnels-in-gaza-are-dug-and-detected/ https://www.remsdaq.com/solutions/integrated-security-systems/perimeter-intr... https://www.sciencedirect.com/science/article/abs/pii/092442479187014T https://ui.adsabs.harvard.edu/abs/1999SPIE.3852..106K/abstract https://science.sciencemag.org/content/371/6532/931