Was the paper 'A simple approach to system modeling' published in the year 1981?
Was the publication 'A simple approach to system modeling' published in the year 1981?
ASK { <https://dblp.org/rec/journals/pe/Bard81> <https://dblp.org/rdf/schema#yearOfPublication> '1981' }
<https://dblp.org/rec/journals/pe/Bard81>