[1] H.G. Dales and J. Duncan, Second-order cohomology groups of some semigroup algebras, In Banach algebras, Walter
de gruyter, Berlin, 1998, 101-117.
[2] B.E. Forrest and L.W. Marcoux, Derivation of triangular Banach algebras, Indiana, Univ. Math. Soc., 45 (1996), 441-462.
[3] B.E. Forrest and L.W. Marcoux, Weak amenability of triangular Banach algebras, Tranc. Amer, Math. Soc., 354 (2002),
1435-1452.
[4] F. Gordeau, A.R. Pourabbas and M.C. White, Simplicial cohomology of some semigroup algebras, Canad. Math. Bull.,
50(1) (2007), 56-70.
[5] A.R. Pourabbas, Second cohomology group of group algebras with coefficients in iterated duals, Proc. Amer. Math.
Soc., 32(5) (2004), 1403-1410.