@article{ADM_2015_20_1_a1,
     author = {Juan Pablo Acosta and Oswaldo Lezama},
     title = {Universal property of skew $PBW$ extensions},
     journal = {Algebra and discrete mathematics},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2015_20_1_a1/}
}