@article{10_4153_CJM_1977_038_5,
     author = {Apt, K. R.},
     title = {Recursive {Embeddings} of {Partial} {Orderings}},
     journal = {Canadian journal of mathematics},
     pages = {349--359},
     year = {1977},
     volume = {29},
     number = {2},
     doi = {10.4153/CJM-1977-038-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-038-5/}
}