@misc {IOPORT.71039370,
    author       = {Trewin, Shari and Hanson, Vicki L. and Laff, Mark and Cavender, Anna},
    title        = {Powerup: an accessible virtual world},
    howpublished = {ASSETS, 177-184 (2008).},
    year         = {2008},
    doi          = {10.1145/1414471.1414504},
    identifier   = {71039370},
}