Davy Suvée Wim Vanderperren Dennis Wagelaar Viviane Jonckers There are no Aspects. 153-174 2005 114 Electr. Notes Theor. Comput. Sci. http://dx.doi.org/10.1016/j.entcs.2004.12.012 db/journals/entcs/entcs114.html#SuveeVWJ05