This is the 'paper' / monograph I think people refer to when they make this claim. https://archive.org/details/ufintsev-method-of-edge-waves-in-the-physical-th

This is the 'paper' / monograph I think people refer to when they make this claim. https://archive.org/details/ufintsev-method-of-edge-waves-in-the-physical-theory-of-diffraction/mode/2up https://archive.org/details/ufintsev-method-of-edge-waves-in... Wiki link about 117 development that mentions the work by Pyotr Ufimtsev. https://en.wikipedia.org/wiki/Lockheed_F-117_Nighthawk#Development https://en.wikipedia.org/wiki/Lockheed_F-117_Nighthawk#Devel...