Not sure if "foundational", but I would add these because they have interesting mental models: Implementing Atomic Actions on Decentralized Data by David Reed

Not sure if "foundational", but I would add these because they have interesting mental models: Implementing Atomic Actions on Decentralized Data by David Reed https://pages.cs.wisc.edu/~remzi/Classes/739/Spring2003/Papers/p3-reed.pdf https://pages.cs.wisc.edu/~remzi/Classes/739/Spring2003/Pape... Virtual Time by David Jefferson http://cobweb.cs.uga.edu/~maria/pads/papers/p404-jefferson.pdf http://cobweb.cs.uga.edu/~maria/pads/papers/p404-jefferson.p...