@article{FPM_2013_18_4_a7,
     author = {I. V. Mitrofanov},
     title = {Periodicity of morphic words},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {107--119},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2013_18_4_a7/}
}