@article {nonexistence,
    AUTHOR = {Gaucher, P.},
     TITLE = {Flow does not model flows up to weak dihomotopy},
   JOURNAL = {Appl. Categ. Structures},
  FJOURNAL = {Applied Categorical Structures. A Journal Devoted to
              Applications of Categorical Methods in Algebra, Analysis,
              Order, Topology and Computer Science},
    VOLUME = {13},
      YEAR = {2005},
    NUMBER = {5-6},
     PAGES = {371--388},
      ISSN = {0927-2852},
     CODEN = {ACASE6},
   MRCLASS = {55U35 (18A32 68Q85)},
  MRNUMBER = {MR2198809 (2006i:55024)},
MRREVIEWER = {J{\'e}r{\^o}me Scherer},
}