1. Bandieri, P., Casali, M. R. and Gagliardi, C.: Representing manifolds by crystallization theory: Foundations, improvements and related results, Atti Sem. Mat. Fis. Univ. Modena 49(Suppl.) (2001), 157?178.
2. Casali, M. R.: A catalogue of the genus two 3-manifolds, Atti Sem. Mat. Fis. Univ. Modena 37 (1989), 207?236.
3. Casali, M. R.: Computing Matveev?s complexity of non-orientable 3-manifolds via crystallization theory, Topology Appl., to appear.
4. Casali, M. R. and Grasselli, L.: 2-symmetric crystallizations and 2-fold branched covering of $\mathbb{S}^{3}$ , Discrete Math. 87 (1991), 9?22.
5. Casali, M. R. and Gagliardi, C.: A code for m-bipartite edge-coloured graphs, Rend. Istit. Mat. Univ. Trieste 32 (2001), 55?76.