@article{MAT_1971_15_1_a4,
     author = {H. Kunita and Sh. Watanabe},
     title = {On square integrable martingales},
     journal = {Matematika},
     pages = {66--102},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1971_15_1_a4/}
}