By Ball L.J.A.   in Journal of Mathematical Analysis and Applications

ISSN:0022-247X|222|2|460-483

Academic Press‎(1998)‎

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By Ball L.J.   Ormerod T.C.   in International Journal of Human-Computer Studies

ISSN:1071-5819|53|1|147-168

Academic Press‎(2000)‎

Access to resources Favorite 4.8300123