Wolfgang J. Paul. On Time Hierarchies. J. Comput. Syst. Sci., 19(2):197-202, 1979.
@article{Paul79,
title = {On Time Hierarchies},
author = {Wolfgang J. Paul},
year = {1979},
researchr = {https://researchr.org/publication/Paul79},
cites = {0},
citedby = {0},
journal = {J. Comput. Syst. Sci.},
volume = {19},
number = {2},
pages = {197-202},
}