Media type: E-Article Title: Zoom interaction design for pen-operated portable devices Contributor: Büring, Thorsten; Gerken, Jens; Reiterer, Harald imprint: Elsevier BV, 2008 Published in: International Journal of Human-Computer Studies Language: English DOI: 10.1016/j.ijhcs.2008.03.005 ISSN: 1071-5819 Keywords: Hardware and Architecture ; Human-Computer Interaction ; General Engineering ; Education ; Human Factors and Ergonomics ; Software Origination: Footnote: