Dalia Krieger, Jeffrey Shallit. Every real number greater than 1 is a critical exponent. Theoretical Computer Science, 381(1-3):177-182, 2007. [doi]
@article{KriegerS07,
title = {Every real number greater than 1 is a critical exponent},
author = {Dalia Krieger and Jeffrey Shallit},
year = {2007},
doi = {10.1016/j.tcs.2007.04.037},
url = {http://dx.doi.org/10.1016/j.tcs.2007.04.037},
researchr = {https://researchr.org/publication/KriegerS07},
cites = {0},
citedby = {0},
journal = {Theoretical Computer Science},
volume = {381},
number = {1-3},
pages = {177-182},
}