Cristian S. Calude, Gabriel Istrate, Marius Zimand. Recursive Baire Classification and Speedable Functions. Math. Log. Q., 38(1):169-178, 1992. [doi]
@article{CaludeIZ92,
title = {Recursive Baire Classification and Speedable Functions},
author = {Cristian S. Calude and Gabriel Istrate and Marius Zimand},
year = {1992},
doi = {10.1002/malq.19920380112},
url = {http://dx.doi.org/10.1002/malq.19920380112},
researchr = {https://researchr.org/publication/CaludeIZ92},
cites = {0},
citedby = {0},
journal = {Math. Log. Q.},
volume = {38},
number = {1},
pages = {169-178},
}