When does a generalized Boolean quasiring become a Boolean ring?

Ivan Chajda, Helmut Länger. When does a generalized Boolean quasiring become a Boolean ring?. Soft Comput., 22(20):6877-6879, 2018. [doi]

@article{ChajdaL18,
  title = {When does a generalized Boolean quasiring become a Boolean ring?},
  author = {Ivan Chajda and Helmut Länger},
  year = {2018},
  url = {https://www.wikidata.org/entity/Q58583706},
  researchr = {https://researchr.org/publication/ChajdaL18},
  cites = {0},
  citedby = {0},
  journal = {Soft Comput.},
  volume = {22},
  number = {20},
  pages = {6877-6879},
}