  In a recent Physics Review Letter, Dorlas and Wedagedera have studied the
random energy model with an additional p-spin ferromagnetic interaction. Here
we note that (i) we have solved the corresponding problem of a spherical spin
system with p-spin glass interactions and r-spin ferromagnetic interactions,
and (ii) a simple mapping yields the results of DW and generalizations.
  Reference: http://arXiv.org/abs/cond-mat/9912201
