Rumo a um modelo conceitual completo: Redes de Petri e Diagramas E/R. - Carlos A. Heuser; Eduardo Meira Peres (RITA, 1989)

ER-T Diagrams: An Approach to Specifying Database Transactions. - Carlos A. Heuser; Eduardo Meira Peres (ER, 1991)

Towards a complete conceptual model: Petri nets and entity-relationship diagrams. - Carlos A. Heuser; Eduardo Meira Peres; Gernot Richter (Inf. Syst., 1993)