Jeffrey L. Kurtz Laurie E. Damianos Robyn Kozierok Lynette Hirschman The MITRE Map Navigation Experiment. 18 1999 31 ACM Comput. Surv. 2es http://doi.acm.org/10.1145/323216.323365 db/journals/csur/csur31.html#KurtzDKH99