Syamal K. Sen, Ravi P. Agarwal, Raffaella Pavani. Best k-digit rational bounds for irrational numbers: Pre- and super-computer era. Mathematical and Computer Modelling, 49(7-8):1465-1482, 2009. [doi]
@article{SenAP09,
title = {Best k-digit rational bounds for irrational numbers: Pre- and super-computer era},
author = {Syamal K. Sen and Ravi P. Agarwal and Raffaella Pavani},
year = {2009},
doi = {10.1016/j.mcm.2008.04.009},
url = {http://dx.doi.org/10.1016/j.mcm.2008.04.009},
researchr = {https://researchr.org/publication/SenAP09},
cites = {0},
citedby = {0},
journal = {Mathematical and Computer Modelling},
volume = {49},
number = {7-8},
pages = {1465-1482},
}