Are there rings around Pluto

@inproceedings{Rawal1991AreTR,
  title={Are there rings around Pluto},
  author={J. J. Rawal and Bijan Nikouravan},
  year={1991}
}
Considering effects of tidal plus centrifugal stress acting on icy-rocks and the tensile strength thereof, icy-rocks being in the density range (1–2.4) g cm -3 which had come into existence as collisional ejecta (debris) in the vicinity of Pluto at the time when Pluto-Charon system came into being as a result of a giant impact of a Kuiper Belt Object on the primordial Pluto, it is shown, here, that these rocks going around Pluto in its vicinity are under slow disruption generating a stable ring… 

References

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Astronomy and Cosmogony