First, Do Nothing: A Passive Protocol for First Contact

2020 https://www.sciencedirect.com/science/article/pii/S026596462030031X?casa_token=6bTsW60xDMoAAAAA:M0IPgeNXww3oCATPA3KYsZZMM8GgzDzOMMmoIdW9t4O7HfFxHBqunOur24ynAt3p-ARdQef8oU_G Academic paper