@article {HDAparadigm,
    AUTHOR = {Gaucher, P.},
     TITLE = {Directed algebraic topology and higher dimensional transition systems},
   JOURNAL = {New York J. Math.},
  FJOURNAL = {New York Journal of Mathematics},
    VOLUME = {16},
      YEAR = {2010},
     PAGES = {409--461 (electronic)},
}