Reference:

Kai Puolamäki and Leila Koivisto, editors. Biennial report 2000–2001. Laboratory of Computer and Information Science, 2002.

Suggested BibTeX entry:

@book{Puolamaki02biennial,
    editor = {Kai Puolam\"aki and Leila Koivisto},
    publisher = {Laboratory of Computer and Information Science},
    title = {Biennial report 2000--2001},
    year = {2002},
}