@article{oai:tsukuba.repo.nii.ac.jp:00029686,
 author = {Grytczuk, Aleksander and Medryk, Barbara},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {533--538},
 title = {On a result of Flammenkamp-Luca concerning noncototient sequence},
 volume = {29},
 year = {2005}
}