Per Sort

@book{appscimas-book2020,
   booktitle = {Multi-Agent Systems 2019},
   doi = {10.3390/books978-3-03943-047-5},
   editor = {Omicini, Andrea and Mariani, Stefano},
   eisbn = {978-3-03943-047-5},
   iris = {11585/786755},
   isbn = {978-3-03943-046-8},
   month = sep,
   publisher = {MDPI},
   title = {Multi-Agent Systems 2019},
   url = {https://www.mdpi.com/books/pdfview/book/2828},
   urlpdf = {https://www.mdpi.com/books/pdfdownload/book/2828},
   year = 2020
}

@book{appscimas-book2019,
   booktitle = {Multi-Agent Systems},
   doi = {10.3390/books978-3-03897-925-8},
   editor = {Botti, Vicent and Omicini, Andrea and Mariani, Stefano and Julian, Vicente},
   eisbn = {978-3-03897-925-8},
   iris = {11585/786765},
   isbn = {978-3-03897-924-1},
   month = may,
   pages = {392},
   publisher = {MDPI},
   title = {Multi-Agent Systems},
   url = {https://www.mdpi.com/books/pdfview/book/1303},
   urlpdf = {https://www.mdpi.com/books/pdfdownload/book/1303},
   year = 2019
}