@article{DMGAA_2003_23_1_a4,
     author = {Pszczo{\l}a, Krzysztof and Romanowska, Anna and Smith, Jonathan},
     title = {Duality for some free modes},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {45--61},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2003_23_1_a4/}
}