AntonĂn Kucera, Theodore A. Slaman. Low upper bounds of ideals. Journal of Symbolic Logic, 74(2):517-534, 2009. [doi]
@article{KuceraS09, title = {Low upper bounds of ideals}, author = {AntonĂn Kucera and Theodore A. Slaman}, year = {2009}, url = {http://projecteuclid.org/euclid.jsl/1243948325}, researchr = {https://researchr.org/publication/KuceraS09}, cites = {0}, citedby = {0}, journal = {Journal of Symbolic Logic}, volume = {74}, number = {2}, pages = {517-534}, }