@article{AMI_2006_33_a6,
     author = {Aleksander Grytczuk},
     title = {Ljunggren{\textquoteright}s {Diophantine} problem connected with virus structure},
     journal = {Annales mathematicae et informaticae},
     pages = {69--75},
     publisher = {mathdoc},
     volume = {33},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_2006_33_a6/}
}