@article{SM_1982_43_2_a0,
     author = {L. I. Gal'chuk},
     title = {Decomposition of optional supermartingales},
     journal = {Sbornik. Mathematics},
     pages = {145--158},
     year = {1982},
     volume = {43},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1982_43_2_a0/}
}