Michael Soltys. The proof theoretic strength of the Steinitz exchange theorem. Discrete Applied Mathematics, 155(1):53-60, 2007. [doi]
@article{Soltys07,
title = {The proof theoretic strength of the Steinitz exchange theorem},
author = {Michael Soltys},
year = {2007},
doi = {10.1016/j.dam.2006.05.001},
url = {http://dx.doi.org/10.1016/j.dam.2006.05.001},
researchr = {https://researchr.org/publication/Soltys07},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {155},
number = {1},
pages = {53-60},
}