Imed Basdouri, Issam Bartouli, Jean Lerbet. Deforming $h$-trivial the Lie algebra Vect($S^1$) inside the Lie algebra of pseudodifferential operators $Ψ\mathcal{DO}$.
International Journal of Geometric Methods in Modern Physics, World Scientific Publishing, 2017, 14 (6),
⟨10.1142/S0219887817500827⟩.
⟨hal-01528767⟩