Reference:

Kai Puolamäki, editor. Proceedings of the ACM SIGKDD Workshop on Visual Analytics and Knowledge Discovery, Otaniemi, 2009.

Suggested BibTeX entry:

@proceedings{Puolamaki09vakd,
    address = {Otaniemi},
    editor = {Kai Puolam\"aki},
    title = {Proceedings of the {ACM} {SIGKDD} Workshop on Visual Analytics and Knowledge Discovery},
    year = {2009},
}