@article{JDM_1908__17_145119,
     author = {Arthur Ranum},
     title = {The {Number} of {Classes} of {Conjugate} {Periodic} {Linear} {Substitutions} with {Rational} {Coefficients.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {234--236},
     publisher = {mathdoc},
     volume = {17},
     year = {1908},
     zbl = {39.0196.01},
     url = {http://geodesic.mathdoc.fr/item/JDM_1908__17_145119/}
}