@article{10_4153_CJM_2012_003_8,
     author = {Lyall, Neil and Magyar, \'Akos},
     title = {Optimal {Polynomial} {Recurrence}},
     journal = {Canadian journal of mathematics},
     pages = {171--194},
     year = {2013},
     volume = {65},
     number = {1},
     doi = {10.4153/CJM-2012-003-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2012-003-8/}
}