@article{RM_1999_54_5_a14,
     author = {Yu. M. Polyakova},
     title = {Further properties of the categories $P_d$ and~$S_d$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1040--1041},
     publisher = {mathdoc},
     volume = {54},
     number = {5},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1999_54_5_a14/}
}