  We present a parameterization of the stabilizing controllers over commutative
rings. In the classical case, that is, in the case where there exist the
right-/left-coprime factorizations of the given plant, the stabilizing
controllers can be parameterized by the method called
``Youla-Kucera-parameterization''. However, it is known that there exist models
in which some stabilizable transfer matrices do not have their
right-/left-coprime factorizations. In such models, we cannot employ the
Youla-Kucera-parameterization directly. Our method of this paper can be applied
to even such models.
