@article{10_4064_ap_62_2_97_110,
     author = {Marek Ptak},
     title = {The algebra generated by a pair of operator weighted shifts},
     journal = {Annales Polonici Mathematici},
     pages = {97--110},
     publisher = {mathdoc},
     volume = {62},
     number = {2},
     year = {1995},
     doi = {10.4064/ap-62-2-97-110},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-62-2-97-110/}
}