@article{oai:tsukuba.repo.nii.ac.jp:00017302,
 author = {Grytczuk, Aleksander and Grytczuk, Jaroslaw},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {229--235},
 title = {Ljunggren's trinomials and matrix equation A^x + A^y = A^z},
 volume = {26},
 year = {2002}
}