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Two generalized Harry Dym equations, recently found by Brunelli, Das andPopowicz in the bosonic limit of new supersymmetric extensions of the Harry Dymhierarchy [J. Math. Phys. 44:4756--4767 (2003)], are transformed intopreviously known integrable systems: one--into a pair of decoupled KdVequations, the other one--into a pair of coupled mKdV equations from abi-Hamiltonian hierarchy of Kupershmidt.Comment: 7 page

On bosonic limits of two recent supersymmetric extensions of the Harry Dym hierarchy