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Magri, 1984, A geometrical characterization of integrable Hamiltonian systems through the theory of Poisson-Nijenhuis manifolds, Quaderno, 19

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Mackenzie, 1994, Lie bialgebroids and Poisson groupoids, Duke Math. J., 73, 415, 10.1215/S0012-7094-94-07318-3

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Liu, 1998, Dirac structures and Poisson homogeneous spaces, Commun. Math. Phys., 192, 121, 10.1007/s002200050293