Jeffry L. Hirst. Reverse Mathematics and Ordinal Exponentiation. Annals of Pure and Applied Logic, 66(1):1-18, 1994.
@article{Hirst94, title = {Reverse Mathematics and Ordinal Exponentiation}, author = {Jeffry L. Hirst}, year = {1994}, researchr = {https://researchr.org/publication/Hirst94}, cites = {0}, citedby = {0}, journal = {Annals of Pure and Applied Logic}, volume = {66}, number = {1}, pages = {1-18}, }