@article{FAA_2012_46_3_a4,
     author = {L. E. Positsel'skii},
     title = {Closed {Form} {Algebra} on a {Disk} is {Koszul}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {71--80},
     publisher = {mathdoc},
     volume = {46},
     number = {3},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2012_46_3_a4/}
}