@article{smolka-2019-guarded,
  author    = {Steffen Smolka and
               Nate Foster and
               Justin Hsu and
               Tobias Kapp{\'{e}} and
               Dexter Kozen and
               Alexandra Silva},
  title     = {Guarded Kleene algebra with tests: verification of uninterpreted programs in nearly linear time},
  journal   = {{PACMPL}},
  volume    = {4},
  number    = {{POPL}},
  pages     = {61:1--61:28},
  year      = {2020},,
  doi       = {10.1145/3371129},
}