1. Basdouri, I., Ben Ammar, M., Ben Fraj, N., Boujelbene, M., Kammoun, K.: Cohomology of the Lie superalgebra of contact vector fields on $${\mathbb{R}}^{1|1}$$ and deformations of the superspace of symbols. math.RT/0702645
2. Fuchs, D.B.: Cohomology of infinite-dimensional Lie algebras. Plenum Publication, New York (1986)
3. Gargoubi H. (2000). Sur la géométrie de l’espace des opérateurs différentiels linéaires sur $${\mathbb{R}}$$ . Bull. Soc. R. Sci. Liège 69(1): 21–47
4. Gargoubi H., Mellouli N., Ovsienko V. (2007). Differential operators on supercircle: conformally equivariant quantization and symbol calculus. Lett. Math. Phys. 79: 51–65
5. Lecomte P.B.A. (2000). On the cohomology of $${\mathfrak{sl}}(n + 1; {\mathbb{R}})$$ acting on differential operators and $${\mathfrak{sl}}(n + 1; {\mathbb{R}})$$ -equivariant symbols. Math. NS. 11(1), 95–114