Peter N. Creasy. Extending graphical conceptual schema languages. PhD thesis, University of Queensland, Australia, 1988. [doi]
@phdthesis{au-1201, title = {Extending graphical conceptual schema languages}, author = {Peter N. Creasy}, year = {1988}, url = {https://search.library.uq.edu.au/permalink/f/l3gdeh/61UQ_ALMA2189127680003131}, researchr = {https://researchr.org/publication/au-1201}, cites = {0}, citedby = {0}, school = {University of Queensland, Australia}, }