HOOD and Z for the Development of Complex Software Systems. - Raffaele di Giovanni; Pier Luigi Iachini (VDM Europe, 1990)

Operation Schema Iterations. - Pier Luigi Iachini (Z User Workshop, 1990)

The generic reusable component: an approach to reuse hierarchical OO designs. - Massimo D'Alessandro; Pier Luigi Iachini; Alessandra Martelli (IWSR, 1993)