Mention the years in which 'Entwicklung und Anwendung von Expertensystemen auf Personal Computern' and 'Olympic and Paralympic Games Project Structure and Governance: The Case of Olympic and Paralympic Games' were published.
When were 'Entwicklung und Anwendung von Expertensystemen auf Personal Computern' and 'Olympic and Paralympic Games Project Structure and Governance: The Case of Olympic and Paralympic Games' published?
SELECT DISTINCT ?answer WHERE { { <https://dblp.org/rec/journals/robotersysteme/MertensS87> <https://dblp.org/rdf/schema#yearOfPublication> ?answer } UNION { <https://dblp.org/rec/journals/ijitpm/LimaPSCD22> <https://dblp.org/rdf/schema#yearOfPublication> ?answer } }
<https://dblp.org/rec/journals/robotersysteme/MertensS87> <https://dblp.org/rec/journals/ijitpm/LimaPSCD22>