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by Oulasvirta, Antti; Kristensson, Per Ola; Bi, Xiaojun; et al.
by Edvardsson, Bo; Gustafsson, Anders; Kristensson, Per; et al.
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by John H. Williamson, Antti Oulasvirta, Per Ola Kristensson, and Nikola Banovic
by Kristensson, Per; Magnusson, Peter; Witell, Lars