?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Tran%2C+Dinh+Duong&rft.aulast=Tran&rft.aufirst=Dinh+Duong&rft.date=4+December+2020&rft.title=Lemma+Weakening+for+State+Machine+Invariant+Proofs&rft.genre=proceeding