A. I. Generalov, N. V. Kosmatov, “Projective resolutions and Yoneda algebras for algebras of dihedral type: the family $D(3\mathcal Q)$”, Fundam. Prikl. Mat., 10:4 (2004), 65–89; J. Math. Sci., 140:2 (2007), 221–238
A. I. Generalov, N. V. Kosmatov, “Computation of the Yoneda algebras for algebras of dihedral type”, Zap. Nauchn. Sem. POMI, 305 (2003), 101–120; J. Math. Sci. (N. Y.), 130:3 (2005), 4699–4711
N. V. Kosmatov, “Upper bounds on homological dimensions of pullback rings. II”, Zap. Nauchn. Sem. POMI, 272 (2000), 234–237; J. Math. Sci. (N. Y.), 116:1 (2003), 3014–3015
1999
4.
N. V. Kosmatov, “Upper bound of the global dimension of pullback rings”, Fundam. Prikl. Mat., 5:4 (1999), 1251–1253
5.
N. V. Kosmatov, “Upper bounds on homological dimensions of pullback rings”, Zap. Nauchn. Sem. POMI, 265 (1999), 222–228; J. Math. Sci. (New York), 112:4 (2002), 4367–4370