Simple Contracted Complexes are Nonshellable. - Luigi Grasselli (Eur. J. Comb., 1987)

2-Symmetric crystallizations and 2-fold branched coverings of S3. - Maria Rita Casali; Luigi Grasselli (Discret. Math., 1991)

Representing products of polyhedra by products of edge-colored graphs. - Carlo Gagliardi; Luigi Grasselli (J. Graph Theory, 1993)

Tetrahedron manifolds via coloured graphs. - Luigi Grasselli; Salvina Piccarreta (Discret. Math., 1998)

2-Symmetric Transformations for 3-Manifolds of Genus 2. - Luigi Grasselli; Michele Mulazzani; Roman Nedela (J. Comb. Theory B, 2000)