"While working in Moscow, Ufimtsev became interested in describing the reflection of electromagnetic waves. He gained permission to publish his research results

"While working in Moscow, Ufimtsev became interested in describing the reflection of electromagnetic waves. He gained permission to publish his research results internationally because they were considered to be of no significant military or economic value." https://en.wikipedia.org/wiki/Pyotr_Ufimtsev https://en.wikipedia.org/wiki/Pyotr_Ufimtsev Looks like he's still publishing papers in this area: https://ieeexplore.ieee.org/author/37344722000 https://ieeexplore.ieee.org/author/37344722000