Are Two Binary Operators Necessary to Obtain a Finite Axiomatisation of Parallel Composition?

Luca Aceto, Valentina Castiglioni, Wan J. Fokkink, Anna Ingólfsdóttir, Bas Luttik. Are Two Binary Operators Necessary to Obtain a Finite Axiomatisation of Parallel Composition?. ACM Trans. Comput. Log., 23(4), 2022. [doi]

@article{AcetoCFIL22,
  title = {Are Two Binary Operators Necessary to Obtain a Finite Axiomatisation of Parallel Composition?},
  author = {Luca Aceto and Valentina Castiglioni and Wan J. Fokkink and Anna Ingólfsdóttir and Bas Luttik},
  year = {2022},
  doi = {10.1145/3529535},
  url = {https://doi.org/10.1145/3529535},
  researchr = {https://researchr.org/publication/AcetoCFIL22},
  cites = {0},
  citedby = {0},
  journal = {ACM Trans. Comput. Log.},
  volume = {23},
  number = {4},
}