The asymptotic distribution of random clumps. - Robert Hafner (Computing, 1972)

Automatic Generation of Background Text to Aid Classification. - Sarah Zelikovitz; Robert Hafner (FLAIRS, 2004)

Using Micro-Visualisations to Support Faceted Filtering of Recommender Results. - Gerwald Tschinkel; Robert Hafner; Peter Hasitschka; Vedran Sabol (IV, 2016)