A propositional calculus in which expressions are loosing their sense

@article{PirgRzepecka1966APC,
  title={A propositional calculus in which expressions are loosing their sense},
  author={Krystyna Pir{\'o}g-Rzepecka},
  journal={Studia Logica},
  year={1966},
  volume={18},
  pages={163-164}
}