@article{10_4153_CJM_1970_093_9,
     author = {McCool, James},
     title = {Embedding {Theorems} for {Countable} {Groups}},
     journal = {Canadian journal of mathematics},
     pages = {827--835},
     year = {1970},
     volume = {22},
     number = {4},
     doi = {10.4153/CJM-1970-093-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-093-9/}
}