Peter Koepke. The Consistency Strength of the Free-Subset Property for omega::omega::. Journal of Symbolic Logic, 49(4):1198-1204, 1984.
@article{Koepke84, title = {The Consistency Strength of the Free-Subset Property for omega::omega::}, author = {Peter Koepke}, year = {1984}, tags = {consistency}, researchr = {https://researchr.org/publication/Koepke84}, cites = {0}, citedby = {0}, journal = {Journal of Symbolic Logic}, volume = {49}, number = {4}, pages = {1198-1204}, }