Assessing the effectiveness of pen-based input queries. - Stephen Levin; Paul D. Clough; Mark Sanderson (SIGIR, 2003)

Which user interaction for cross-language information retrieval? Design issues and reflections. - Daniela Petrelli; Stephen Levin; Micheline Beaulieu; Mark Sanderson (J. Assoc. Inf. Sci. Technol., 2006)