@article{10_4153_CMB_1993_006_5,
     author = {Cogswell, Kurt D.},
     title = {A {Multiparameter,} {Zero} {Density} {Subsequence} {Ergodic} {Theorem}},
     journal = {Canadian mathematical bulletin},
     pages = {33--37},
     year = {1993},
     volume = {36},
     number = {1},
     doi = {10.4153/CMB-1993-006-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-006-5/}
}