Per anno

 @techreport{multitheorylogiclanguages-liatr96009,
    address = {Bologna, Italy},
    author = {Omicini, Andrea},
    institution = {Department of Electronics, Computer Science and Systems (DEIS), Università di Bologna},
    keywords = {Multi-Theory Logic Languages, Object-Oriented Logic Programming, Modules},
    number = {DEIS-LIA-96-009},
    scholar = {11133488655293125604},
    series = {DEIS Technical Reports},
    subseries = {LIA Series},
    title = {A General Framework for Multi-Theory Logic Languages},
    volume = 16,
    year = 1996
}