@article{10_4153_CJM_1969_064_1,
     author = {Christiansen, R. A.},
     title = {Recurrent {Transformation} {Groups}},
     journal = {Canadian journal of mathematics},
     pages = {564--575},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-064-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-064-1/}
}