When were the publications 'Web usability: a review of the research' and 'Insecurity of an IBEET Scheme and an ABEET Scheme' published?
Mention the years in which 'Web usability: a review of the research' and 'Insecurity of an IBEET Scheme and an ABEET Scheme' were published.
SELECT DISTINCT ?answer WHERE { { <https://dblp.org/rec/journals/sigchi/Lee99> <https://dblp.org/rdf/schema#yearOfPublication> ?answer } UNION { <https://dblp.org/rec/journals/access/LiaoCHRPZ19> <https://dblp.org/rdf/schema#yearOfPublication> ?answer } }
<https://dblp.org/rec/journals/sigchi/Lee99> <https://dblp.org/rec/journals/access/LiaoCHRPZ19>