Computation of the Yoneda algebras for algebras of dihedral type

We continue a series of papers in which the Yoneda algebra is computed for algebras of dihedral and semidihedral types. In this paper, the Yoneda algebra is computed for one more family of algebras, namely, for the family $D(3\mathcal L)$ (in the classification of K. Erdmann). In order to find the minimal resolutions of simple modules, we used for the first time a $C^{++}$ program implemented by the second author.