John Lake. Characterising the largest, countable partial ordering. Math. Log. Q., 21(1):353-354, 1975. [doi]
@article{Lake75-0, title = {Characterising the largest, countable partial ordering}, author = {John Lake}, year = {1975}, doi = {10.1002/malq.19750210143}, url = {http://dx.doi.org/10.1002/malq.19750210143}, researchr = {https://researchr.org/publication/Lake75-0}, cites = {0}, citedby = {0}, journal = {Math. Log. Q.}, volume = {21}, number = {1}, pages = {353-354}, }