@article{10_4064_sm_110_3_221_234,
     author = {Gerold Alsmeyer},
     title = {A recurrence theorem for square-integrable martingales},
     journal = {Studia Mathematica},
     pages = {221--234},
     publisher = {mathdoc},
     volume = {110},
     number = {3},
     year = {1994},
     doi = {10.4064/sm-110-3-221-234},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-110-3-221-234/}
}