Ursula Hyrkkänen Ari Putkonen Matti Vartiainen Complexity and Workload Factors in Virtual Work Environments of Mobile Work. 85-94 2007 conf/hci/2007-17 HCI (17) http://dx.doi.org/10.1007/978-3-540-73333-1_11 db/conf/hci/hci2007-17.html#HyrkkanenPV07