Jason Z. S. Hu, Ondrej Lhoták. Undecidability of d<: and its decidable fragments. Proceedings of the ACM on Programming Languages, 4(POPL), 2020. [doi]
@article{HuL20, title = {Undecidability of $d_{<:}$ and its decidable fragments}, author = {Jason Z. S. Hu and Ondrej Lhoták}, year = {2020}, doi = {10.1145/3371077}, url = {https://doi.org/10.1145/3371077}, researchr = {https://researchr.org/publication/HuL20}, cites = {0}, citedby = {0}, journal = {Proceedings of the ACM on Programming Languages}, volume = {4}, number = {POPL}, }