@article{Matkowski:2020,
author
=
"J.Matkowski and P.Wójcik",
title
=
"Sandwich results for periodicity and conjugacy",
journal
=
"Aequationes Mathematicae",
volume
=
"Vol. 94",
number
=
"iss. 2",
pages
=
"381--391",
year
=
"2020",
}