Comment on ``Exact solutions of cylindrical and spherical dust ion acoustic waves'' [Phys. Plasmas 10, 4162 (2003)]

Dusty plasmas have been found almost everywhere in the Universe. Sahu and Roychoudhury [Phys. Plasmas 10, 4162 (2003)] have done their interesting analytic work on the cylindrical dust ion-acoustic waves, without enough guidance to the readers on other existing analytic results. Such lack of guidance turns out to be critical. We hereby try to make the story more complete in the sense that the model does have plenty of exact analytic solutions published already, and to present a brief review on some of them. For the dust-ion-acoustic and dust-acoustic modes supported by the space/laboratory dusty plasmas, we hereby picture out some possibly observable effects for the future experiments, featured by a solitonic pulse aboard the varying ambient field propagating with its varying velocity and amplitude.