@article{LJM_2007_26_a9,
     author = {M. S. Matveichuk and A. M. Ionova},
     title = {Positive projections as generators of $J$-projections of {type~(B)}},
     journal = {Lobachevskii journal of mathematics},
     pages = {91--105},
     publisher = {mathdoc},
     volume = {26},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/LJM_2007_26_a9/}
}