On a Special Class of Primitive Words.

Elena Czeizler Lila Kari Shinnosuke Seki On a Special Class of Primitive Words. 265-277 2008 MFCS http://dx.doi.org/10.1007/978-3-540-85238-4_21 conf/mfcs/2008 db/conf/mfcs/mfcs2008.html#CzeizlerKS08