@article{IJOPCM_2009__2_4_226777,
     author = {Abbassi, Hossein and Nourouzi, Kourosh},
     title = {A note on the paper {{\textquotedblleft}Characterizations} on 2-isometries{\textquotedblright}.},
     journal = {International journal of open problems in computer science and mathematics},
     pages = {572},
     year = {2009},
     volume = {2},
     number = {4},
     zbl = {1214.46003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJOPCM_2009__2_4_226777/}
}