@article{10_4153_CMB_1983_079_2,
     author = {Olsen, James H.},
     title = {A {Multiple} {Sequence} {Ergodic} {Theorem}},
     journal = {Canadian mathematical bulletin},
     pages = {493--497},
     year = {1983},
     volume = {26},
     number = {4},
     doi = {10.4153/CMB-1983-079-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1983-079-2/}
}