Pamela Ravasio Sissel Guttormsen Schär Helmut Krueger In pursuit of desktop evolution: User problems and practices with modern desktop systems. 156-180 2004 11 ACM Trans. Comput.-Hum. Interact. 2 http://doi.acm.org/10.1145/1005361.1005363 db/journals/tochi/tochi11.html#RavasioSK04