@article{10_4153_CMB_1984_067_7,
     author = {Borwein, J. M. and Borwein, P. B.},
     title = {Cubic and {Higher} {Order} {Algorithms} for \ensuremath{\pi}},
     journal = {Canadian mathematical bulletin},
     pages = {436--443},
     year = {1984},
     volume = {27},
     number = {4},
     doi = {10.4153/CMB-1984-067-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1984-067-7/}
}