Jeffry L. Hirst. Embeddings of countable closed sets and reverse mathematics. Arch. Math. Log., 32(6):443-449, 1993. [doi]
@article{Hirst93-0, title = {Embeddings of countable closed sets and reverse mathematics}, author = {Jeffry L. Hirst}, year = {1993}, doi = {10.1007/BF01270467}, url = {http://dx.doi.org/10.1007/BF01270467}, researchr = {https://researchr.org/publication/Hirst93-0}, cites = {0}, citedby = {0}, journal = {Arch. Math. Log.}, volume = {32}, number = {6}, pages = {443-449}, }