@article{sacscuza:calude1994ttoccea,
  title={Three Theories of Computational Complexity Extended Abstract.},
  author={Cristian CALUDE, Monica TATARAM},
  journal={Scientific Annals of Computer Science},
  number={3},
  organization={``A.I. Cuza'' University, Ia\c si, Rom\^ania},
  year={1994},
  pages={45--52},
  publisher={``A.I. Cuza'' University Press, Ia\c si}
}